| Acaroletes tetranychi Kieffer, 1908 | |
| Acericecis chaneyi ♰ T. D. A. Coc..., 1927 | |
| Acericecis ocellaris Osten Sacken, 1862 | Ocellate gall midge |
| Acoenonia perissa Pritchard, 1947 | Holmgren milk-vetch |
| Adiplosis toxicodendri Felt, 1907 | |
| Allarete barberi Felt, 1908 | |
| Allarete bicornuta Jaschhof, 1997 | |
| Allarete vernalis Felt, 1908 | |
| Amedia floridana Jaschhof, 1997 | |
| Ametrodiplosis dulichii Felt, 1912 | |
| Ampelomyia vitiscoryloides Packard, 1869 | Grape Filbert Gall |
| Ampelomyia vitispomum Osten Sacken, 1878 | |
| Anarete aldrichii Felt, 1915 | |
| Anarete anepsia Pritchard, 1951 | Horn's milkvetch |
| Anarete buscki Felt, 1915 | |
| Anarete corni Felt, 1907 | |
| Anarete diervillae Felt, 1907 | |
| Anarete edwardsi Pritchard, 1951 | Horn's milkvetch |
| Anarete felti Pritchard, 1951 | Horn's milkvetch |
| Anarete iridis Cockerell, 1914 | |
| Anarete johnsoni Felt, 1908 | Gall gnat |
| Anarete lacteipennis Kieffer, 1906 | Showy fameflower |
| Anarete pritchardi Kim, 1967 | |
| Anarete rubra Kieffer, 1906 | Showy fameflower |
| Anaretella defecta Winnertz, 1870 | |
| Anaretella iola Pritchard, 1951 | Horn's milkvetch |
| Ancylodiplosis bryanti Felt, 1913 | |
| Anocha celesteana Pritchard, 1960 | Groundcover milkvetch |
| Anocha spinosa Felt, 1913 | |
| Anthrocnodax apiphilus | |
| Anthrocnodax carolina | |
| Apagodiplosis papyriferae Gagne, 1967 | |
| Aphidoletes abietis Kieffer, 1896 | |
| Aphidoletes aphidimyza Rondani, 1847 | Aphid Midge |
| Aphidoletes aphidomyza Rondani, 1847 | Mescat acacia |
| Aphidoletes cucumeris Lintner, 1888 | |
| Aphidoletes meridionalis (Rondani, 1847) | ⇒ Aphidoletes aphidomyza Rondani, 1847 |
| Aphidoletes rosivora | |
| Aphidoletes thompsoni Möhn, 1954 | Bog rosemary |
| Aphidoletes urticaria Kieffer, 1895 | |
| Aphidoletes urticariae (Kieffer, 1895) | ⇒ Aphidoletes urticaria Kieffer, 1895 |
| Aplonyx sarcobati (Felt, 1914) | ⇒ Protaplonyx sarcobati Felt, 1914 |
| Aprionus asemus Pritchard, 1947 | Holmgren milk-vetch |
| Aprionus bostrichus Berest, 1997 | |
| Aprionus longipennis Felt, 1908 | |
| Aprionus monticola Felt, 1920 | |
| Aprionus pinicorticis Felt, 1908 | |
| Arnoldiola atra Gagne, 1999 | |
| Arnoldiola azaleae Felt, 1907 | |
| Arnoldiola brevicornis Felt, 1907 | |
| Arnoldiola castaneae Felt, 1909 | |
| Arthrocnodax americanus Felt, 1911 | |
| Arthrocnodax annulatus Felt, 1907 | |
| Arthrocnodax apiphilus (Felt, 1907) | ⇒ Silvestriola apiphila Felt, 1907 |
| Arthrocnodax beardsleyi Hardy, 1960 | |
| Arthrocnodax carolina (Felt, 1913) | ⇒ Feltiella insularis Felt, 1913 |
| Arthrocnodax meridionalis Felt, 1912 | |
| Arthrocnodax rhoinus Felt, 1908 | |
| Arthrocnodax walkeriana Felt, 1915 | Gall midge |
| Asphondylia abutilon Felt, 1935 | |
| Asphondylia adenostoma Felt, 1916 | |
| Asphondylia amaranthi Felt, 1935 | |
| Asphondylia ambrosiae Gagne, 1975 | |
| Asphondylia antennariae Wheeler, 1889 | |
| Asphondylia anthocercidis Kolesik, 1997 | |
| Asphondylia apicata Gagne, 1990 | |
| Asphondylia artemisiae Felt, 1908 | |
| Asphondylia atriplicicola Cockerell, 1898 | |
| Asphondylia atriplicis Townsend, 1893 | |
| Asphondylia auripila Felt, 1907 | Low philonotis moss |
| Asphondylia autumnalis Beutenmüller, 1907 | |
| Asphondylia azaleae Felt, 1907 | Low philonotis moss |
| Asphondylia bacchariola Gagne, 1995 | |
| Asphondylia baccharolia Gagne, 1995 | |
| Asphondylia barbata Gagne, 1990 | |
| Asphondylia baroni Felt, 1908 | |
| Asphondylia bea Felt, 1925 | |
| Asphondylia betheli Cockerell, 1907 | |
| Asphondylia bidens Johannsen, 1945 | Bractpod chickweed |
| Asphondylia bigeloviaebrassicoides Townsend, 1893 | |
| Asphondylia borrichiae Rossi & Strong, 1990 | |
| Asphondylia brevicauda Felt, 1907 | Low philonotis moss |
| Asphondylia buddleia Felt, 1935 | |
| Asphondylia bullata Gagne, 1990 | |
| Asphondylia bumeliae (Felt, 1907) | ⇒ Bruggmanniella bumeliae Felt, 1907 |
| Asphondylia caudicis Gagne, 1986 | |
| Asphondylia ceanothi Felt, 1908 | |
| Asphondylia chrysothamni Felt, 1916 | |
| Asphondylia clavata Gagne, 1990 | |
| Asphondylia clematidis Felt, 1935 | |
| Asphondylia cytisi Frauenfeld, 1873 | Punkie |
| Asphondylia diervillae Felt, 1907 | Low philonotis moss |
| Asphondylia digitata Gagne, 1990 | |
| Asphondylia diplaci Felt, 1912 | |
| Asphondylia discalis Gagne, 1990 | |
| Asphondylia dondiae Felt, 1918 | |
| Asphondylia enceliae Felt, 1912 | |
| Asphondylia eupatorii Felt, 1911 | |
| Asphondylia fabalis Gagne, 1990 | |
| Asphondylia floccosa Gagne, 1986 | |
| Asphondylia florea Gagne, 1990 | |
| Asphondylia florida Felt, 1908 | |
| Asphondylia foliata Gagne, 1986 | |
| Asphondylia foliosa Gagne, 1990 | |
| Asphondylia fulvopedalis Felt, 1907 | Low philonotis moss |
| Asphondylia garryae Felt, 1912 | |
| Asphondylia gemmae Gagne, 1986 | |
| Asphondylia germinis Kolesik, 2010 | |
| Asphondylia gutierreziae (Cockerell, 1901) | ⇒ Rhopalomyia gutierreziae Cockerell, 1901 |
| Asphondylia helianthiflorae Felt, 1908 | |
| Asphondylia helianthiglobulus Osten Sacken, 1878 | |
| Asphondylia hydrangeae Felt, 1907 | Low philonotis moss |
| Asphondylia ilicicola Foote, 1953 | Holly berry midge |
| Asphondylia ilicoides Felt, 1907 | Low philonotis moss |
| Asphondylia integrifoliae Felt, 1908 | |
| Asphondylia johnsoni Felt, 1908 | |
| Asphondylia lacinariae Felt, 1935 | |
| Asphondylia mentzeliae Cockerell, 1900 | |
| Asphondylia mimosae Felt, 1934 | |
| Asphondylia monacha Osten Sacken, 1869 | Harbison's hawthorn |
| Asphondylia neomexicana Cockerell, 1896 | |
| Asphondylia nodula Gagne, 1986 | |
| Asphondylia occidentalis Kolesik, 2010 | |
| Asphondylia opuntiae (Felt, 1908) | ⇒ Asphondylia betheli Cockerell, 1907 |
| Asphondylia patens (Beutenmuller, 1907) | ⇒ Asphondylia recondita Osten Sacken, 1875 |
| Asphondylia photiniae Pritchard, 1952 | Howell's milkvetch |
| Asphondylia pilogereminis Kolesik, 2010 | |
| Asphondylia pilosa (Gagne, 1990) | ⇒ Asphondylia sarothamni Loew, 1850 |
| Asphondylia prosopidis Cockerell, 1898 | Mesquite Gall Midge |
| Asphondylia ratibidae Felt, 1935 | |
| Asphondylia recondita Osten Sacken, 1875 | |
| Asphondylia resinosa Gagne, 1990 | Creosote Resin Gall Mige |
| Asphondylia rosetta Gagne, 1990 | |
| Asphondylia rudbeckiaeconspicua Osten Sacken, 1878 | |
| Asphondylia salictaria Felt, 1907 | Low philonotis moss |
| Asphondylia sarothamni Loew, 1850 | |
| Asphondylia shepherdiae Felt, 1916 | |
| Asphondylia silicula Gagne, 1990 | |
| Asphondylia smilacinae Felt, 1907 | Low philonotis moss |
| Asphondylia solidaginis Beutenmüller, 1907 | |
| Asphondylia thalictri Felt, 1911 | |
| Asphondylia verbenae Felt, 1935 | |
| Asphondylia vernoniae Felt, 1908 | |
| Asphondylia villosa Gagne, 1990 | |
| Asphondylia websteri Felt, 1917 | Alfalfa gall midge |
| Asphondylia xanthii Felt, 1936 | |
| Asteromyia carbonifera Osten Sacken, 1862 | Carbonifera Goldenrod Gall Midge |
| Asteromyia euthamiae Gagne, 1968 | Euthamia Leaf Gall Midge |
| Asteromyia gutierreziae Felt, 1916 | |
| Asteromyia laeviana Felt, 1907 | |
| Asteromyia modesta Felt, 1907 | |
| Asteromyia tumifica Beutenmüller, 1907 | |
| Astictoneura agrostis Osten Sacken, 1862 | |
| Astictoneura muhlenbergiae Marten, 1893 | |
| Asynapta borealis Felt, 1920 | |
| Asynapta cactophila Samuelson, 1964 | |
| Asynapta caudata Felt, 1908 | |
| Asynapta cerasi Felt, 1907 | Low philonotis moss |
| Asynapta flavida Felt, 1908 | |
| Asynapta frosti Felt, 1913 | |
| Asynapta hopkinsi Felt, 1935 | Cone resin midge |
| Asynapta mangiferae Felt, 1909 | Mango bark midge |
| Asynapta marilandica Felt, 1916 | |
| Asynapta saliciperda Felt, 1908 | |
| Asynapta strobilophila Foote, 1956 | |
| Asynapta umbra Felt, 1914 | |
| Baeonotus microps Byers, 1969 | |
| Baldratia dendroides Fedotova, 1992 | |
| Barnesina hylecoites (Pritchard, 1960) | ⇒ Henria hylecoites Pritchard, 1960 |
| Basicondyla fultonensis Felt, 1919 | |
| Blaesodiplosis canadensis Felt, 1908 | |
| Blaesodiplosis crataegibedeguar Osten Sacken, 1878 | |
| Blaesodiplosis crataegifolia Felt, 1907 | |
| Blaesodiplosis venae Stebbins, 1910 | |
| Brachineura americana Felt, 1907 | Low philonotis moss |
| Brachineura eupatorii Felt, 1908 | Gall midge |
| Brachineura vitis Felt, 1908 | |
| Bremia americana Felt, 1914 | |
| Bremia borealis Felt, 1914 | |
| Bremia caricis Felt, 1907 | |
| Bremia filicis Felt, 1907 | Low philonotis moss |
| Bremia fitchii Felt, 1912 | |
| Bremia montana Felt, 1914 | |
| Bremia podophyllae Felt, 1907 | Low philonotis moss |
| Bremia sylvestris Felt, 1920 | |
| Bremia tristis Felt, 1914 | |
| Bruggmanniella bumeliae Felt, 1907 | |
| Bryomyia apsectra (Edwards, 1938) | ⇒ Bryomyia producta Felt, 1908 |
| Bryomyia cambrica (Edwards, 1938) | ⇒ Heterogenella cambrica Edwards, 1938 |
| Bryomyia gibbosa Felt, 1907 | |
| Bryomyia producta Felt, 1908 | |
| Calamomyia agrostis Felt, 1908 | |
| Calamomyia alterniflorae Gagne, 1981 | |
| Calamomyia canadensis Felt, 1907 | |
| Calamomyia consobrina Felt, 1907 | |
| Calamomyia danthoniae Felt, 1909 | |
| Calamomyia echinochloa Felt, 1916 | |
| Calamomyia flavipes Felt, 1908 | |
| Calamomyia hecate Felt, 1908 | |
| Calamomyia inustorum Felt, 1916 | |
| Calamomyia juvenalis Felt, 1908 | |
| Calamomyia liriodendri Felt, 1907 | |
| Calamomyia nassauensis Felt, 1908 | |
| Calamomyia panici Felt, 1908 | |
| Calamomyia phragmites Felt, 1936 | |
| Calamomyia sexmaculata Felt, 1908 | |
| Calamomyia spartinae | |
| Calamomyia squamosa Felt, 1908 | |
| Calamomyia tenuitas Felt, 1908 | |
| Calamomyia tiliaginea Felt, 1908 | |
| Calamomyia tripunctata Felt, 1908 | |
| Camptomyia aestiva Felt, 1912 | |
| Camptomyia antennata Felt, 1920 | |
| Camptomyia canadensis Felt, 1908 | |
| Camptomyia erythromma Kieffer, 1888 | |
| Camptomyia montana (Felt, 1908) | ⇒ Camptomyia panelii Parnell, 1971 |
| Camptomyia multiarticulata Felt, 1908 | |
| Camptomyia multinoda Felt, 1908 | |
| Camptomyia panelii Parnell, 1971 | European plum |
| Camptomyia tsugae Felt, 1913 | |
| Camptoneuromyia adhesa Felt, 1907 | |
| Camptoneuromyia flavescens Felt, 1908 | |
| Camptoneuromyia fulva Felt, 1908 | |
| Camptoneuromyia hamamelidis Felt, 1907 | |
| Camptoneuromyia rubifolia Felt, 1908 | |
| Camptoneuromyia virginica Felt, 1907 | |
| Campylomyza boulderi Felt, 1908 | |
| Campylomyza dilatata Felt, 1907 | Low philonotis moss |
| Campylomyza flavipes Meigen, 1818 | |
| Campylomyza montana Felt, 1913 | |
| Campylomyza scutellata Say, 1823 | |
| Cartodiplosis nyssaecola Beutenmüller, 1907 | |
| Caryadiplosis venicola Gagne, 2008 | |
| Caryomyia aggregata Gagne, 2008 | Hickory Aggregate Gall Midge |
| Caryomyia albipilosa Gagne, 2008 | Hickory White-haired Gall Midge |
| Caryomyia ansericollum Gagne, 2008 | |
| Caryomyia antennata Felt, 1909 | |
| Caryomyia arcuata Gagne, 2008 | Hickory Sombrero Gall Midge |
| Caryomyia asteris Gagne, 2008 | Hickory Starburst Gall Midge |
| Caryomyia caryae Osten Sacken, 1832 | Hickory Sticky Globe Gall Midge |
| Caryomyia caryaecola (Osten Sacken, 1862) | ⇒ Caryomyia ansericollum Gagne, 2008 |
| Caryomyia cilidolium Gagne, 2008 | |
| Caryomyia conoidea Gagne, 2008 | |
| Caryomyia consobrina Felt, 1909 | |
| Caryomyia cucurbitata Gagne, 2008 | Hickory Pumpkin Gall Midge |
| Caryomyia cynipsea Osten Sacken, 1862 | |
| Caryomyia deflexipili Gagne, 2008 | |
| Caryomyia eumaris Gagne, 2008 | |
| Caryomyia flaticrustum Gagne, 2008 | Hickory Puff Tart Gall Midge |
| Caryomyia glauciglobus Gagne, 2008 | Hickory Blue-powder Gall Midge |
| Caryomyia levicrustum Gagne, 2008 | |
| Caryomyia leviglobus Gagne, 2008 | |
| Caryomyia marginata Gagne, 2008 | |
| Caryomyia purpurea Gagne, 2008 | Hickory Purple Gumdrop Gall Midge |
| Caryomyia recurvata Gagne, 2008 | |
| Caryomyia sanguinolenta Osten Sacken, 1862 | Hickory Smooth Gumdrop Gall Midge |
| Caryomyia shmoo Gagne, 2008 | |
| Caryomyia spiniglobus Gagne, 2008 | Hickory Spiny Ball Gall Midge |
| Caryomyia stellata Gagne, 2008 | Hickory Starry-base Gall Midge |
| Caryomyia striolacrustum Gagne, 2008 | |
| Caryomyia subulata Gagne, 2008 | Hickory Awl-shaped Gall Midge |
| Caryomyia tuberculata Gagne, 2008 | Hickory Bumpy Woody Gall Midge |
| Caryomyia tuberidolium Gagne, 2008 | |
| Caryomyia tubicola Osten Sacken, 1862 | Hickory Bullet Gall Midge |
| Caryomyia turbanella Gagne, 2008 | |
| Caryomyia turbinata Gagne, 2008 | |
| Caryomyia urnula Gagne, 2008 | Hickory Urn Gall Midge |
| Caryomyia viscidolium Gagne, 2008 | Hickory Sticky Ginger Jar Gall Midge |
| Catocha americana (Felt, 1908) | ⇒ Catotricha americana Felt, 1908 |
| Catocha barberi (Felt, 1913) | ⇒ Eucatocha barberi Felt, 1913 |
| Catocha latipes Haliday, 1833 | |
| Catocha slossonae (Felt, 1908) | ⇒ Catocha latipes Haliday, 1833 |
| Catocha subobsoleta (Alexander, 1924) | ⇒ Catotricha subobsoleta Alexander, 1924 |
| Catotricha americana Felt, 1908 | |
| Catotricha subobsoleta Alexander, 1924 | |
| Cecidomyia acarivora (Felt, 1907) | ⇒ Feltiella occidentalis Felt, 1912 |
| Cecidomyia amyotii (Géhin, 1861) | ⇒ Sitodiplosis mosellana Géhin, 1857 |
| Cecidomyia annulipes (Walsh, 1864) | ⇒ Hartigiola annulipes Hartig, 1839 |
| Cecidomyia atricornis Walsh, 1864 | |
| Cecidomyia atriplicis (Townsend, 1893) | ⇒ Asphondylia atriplicis Townsend, 1893 |
| Cecidomyia atrocularis Walsh, 1864 | |
| Cecidomyia bisetosa Gagne, 1978 | |
| Cecidomyia brevispatula Gagne, 1978 | |
| Cecidomyia chaneyi Cockerell, 1927 | |
| Cecidomyia collinsoniae (Beutenmuller, 1908) | ⇒ Oligotrophidi collinsoniae Beutenmuller, 1908 |
| Cecidomyia crassulina (Cockerell, 1908) | ⇒ Rhopalomyia crassulina Cockerell, 1908 |
| Cecidomyia decemmaculata Walsh, 1864 | |
| Cecidomyia foliora (Russell & Ho..., 1908) | ⇒ Macrodiplosis erubescens Osten Sacken, 1862 |
| Cecidomyia fortunactus Gagne, 1978 | |
| Cecidomyia graminis (Fitch, 1861) | ⇒ Clinodiplosis graminis Fitch, 1861 |
| Cecidomyia grossulariae (Fitch, 1855) | ⇒ Oligotrophidi grossulariae Fitch, 1855 |
| Cecidomyia hageni Aldrich, 1905 | |
| Cecidomyia inaequalis (Stebbins, 1910) | ⇒ Asphondylia diervillae Felt, 1907 |
| Cecidomyia muscosa Stebbins, 1910 | |
| Cecidomyia neomexicana (Cockerell, 1896) | ⇒ Asphondylia neomexicana Cockerell, 1896 |
| Cecidomyia orbitalis Walsh, 1864 | |
| Cecidomyia ornata Say, 1824 | |
| Cecidomyia poculum Osten Sacken, 1862 | |
| Cecidomyia pontaniiformis T. D. A. Coc..., 1908 | |
| Cecidomyia potentillaecaulis (Stebbins, 1910) | ⇒ Neolasioptera potentillaecaulis Stebbins, 1910 |
| Cecidomyia reburrata Gagne, 1978 | |
| Cecidomyia reniformis Stebbins, 1910 | |
| Cecidomyia silvestrii Trotter, 1911 | |
| Cecidomyia sorghicola Coquillett, 1899 | |
| Cecidomyia squamulicola Stebbins, 1910 | |
| Cecidomyia stercoraria Rubsaamen, 1891 | |
| Cecidomyia strobiligemma (Stebbins, 1910) | ⇒ Rhopalomyia strobiligemma Stebbins, 1910 |
| Cecidomyia tergata Fitch, 1845 | |
| Cecidomyia thoracica (Fitch, 1845) | ⇒ Mycodiplosis thoracica Fitch, 1845 |
| Cecidomyia torreyi (Felt, 1925) | ⇒ Lasiopteridi torreyi Felt, 1925 |
| Cecidomyia tortilis (Gagne, 1978) | ⇒ Dasineura tortilis Bremi, 1847 |
| Cecidomyia urnicola (Osten Sacken, 1875) | ⇒ Dasineura urnicola Osten Sacken, 1875 |
| Cecidomyia vaccinii (Osten Sacken, 1862) | ⇒ Dasineura oxycoccana Johnson, 1899 |
| Cecidomyia verbesinae Beutenmüller, 1907 | |
| Cecidomyiidi acarinivora Tolg, 1921 | |
| Celticecis capsularis Patton, 1897 | Hackberry Rosette Gall Midge |
| Celticecis celtiphyllia Felt, 1908 | Hackberry Acorn Gall Midge |
| Celticecis oviformis Patton, 1897 | |
| Celticecis painteri Felt, 1935 | |
| Celticecis pubescens Patton, 1897 | Hackberry Pubescent Gall Midge |
| Celticecis semenrumicis Patton, 1897 | |
| Celticecis spiniformis Patton, 1897 | Hackberry Thorn Gall Midge |
| Celticecis texana Felt, 1935 | |
| Celticecis unguicula Beutenmüller, 1907 | |
| Celticecis wellsi Wells, 1916 | |
| Chamaediplosis nootkatensis Gagne & Duncan, 1990 | |
| Charidiplosis triangularis Felt, 1908 | |
| Chilophaga coloradensis Felt, 1918 | |
| Chilophaga colorati Felt, 1918 | |
| Chilophaga gyrantis Gagne, 1971 | |
| Chilophaga tripsaci Felt, 1910 | |
| Cicidomyia acarivora | |
| Cincticornia pustulata (Felt, 1909) | ⇒ Polystepha pustulata Felt, 1909 |
| Cincticornia quercifolia (Felt, 1908) | ⇒ Polystepha quercifolia Felt, 1908 |
| Claspettomyia bidentata Felt, 1920 | |
| Claspettomyia hamata Felt, 1907 | |
| Claspettomyia pini Felt, 1907 | |
| Clinodiplosis aestiva Felt, 1908 | |
| Clinodiplosis agraria Felt, 1908 | |
| Clinodiplosis americana Felt, 1911 | |
| Clinodiplosis apocyni Felt, 1908 | |
| Clinodiplosis araneosa Felt, 1912 | |
| Clinodiplosis canadensis Felt, 1911 | |
| Clinodiplosis captiva Felt, 1908 | |
| Clinodiplosis carolina Felt, 1911 | |
| Clinodiplosis cattleyae Molliard, 1903 | Bigberry manzanita |
| Clinodiplosis clarkeae Felt, 1911 | |
| Clinodiplosis contracta Felt, 1908 | |
| Clinodiplosis corticis Felt, 1915 | |
| Clinodiplosis corylifolia Felt, 1907 | |
| Clinodiplosis cyanococci Felt, 1907 | |
| Clinodiplosis examinis Felt, 1913 | |
| Clinodiplosis fibulata Felt, 1908 | |
| Clinodiplosis fulva Felt, 1918 | |
| Clinodiplosis gillettei Felt, 1911 | |
| Clinodiplosis graminis Fitch, 1861 | |
| Clinodiplosis holotricha Felt, 1908 | |
| Clinodiplosis infirma Felt, 1908 | |
| Clinodiplosis intermedia Felt, 1920 | |
| Clinodiplosis lappa Stebbins, 1910 | |
| Clinodiplosis lenis Felt, 1920 | |
| Clinodiplosis longicornis Felt, 1918 | |
| Clinodiplosis meibomiifoliae Beutenmüller, 1907 | |
| Clinodiplosis modesta Felt, 1908 | |
| Clinodiplosis obscura Felt, 1908 | |
| Clinodiplosis paucifili Felt, 1908 | |
| Clinodiplosis phlox Greene, 1941 | |
| Clinodiplosis populi Felt, 1908 | |
| Clinodiplosis pratensis Felt, 1908 | |
| Clinodiplosis pucciniae (Pritchard, 1948) | ⇒ Mycodiplosis pucciniae Pritchard, 1948 |
| Clinodiplosis rhododentri Felt, 1939 | |
| Clinodiplosis robusta Felt, 1908 | |
| Clinodiplosis rubida Felt, 1918 | |
| Clinodiplosis rubisolita Felt, 1908 | |
| Clinodiplosis sanguinia Felt, 1908 | |
| Clinodiplosis setariae Felt, 1907 | |
| Clinodiplosis spiraeaflorae Felt, 1907 | |
| Clinodiplosis spiraeina Felt, 1911 | |
| Clinodiplosis tenuitas Felt, 1908 | |
| Clinodiplosis terrestris Felt, 1908 | |
| Clinodiplosis tsugae Felt, 1907 | |
| Clinodiplosis uliginosa Felt, 1914 | |
| Clinodiplosis variabilis Felt, 1908 | |
| Clinodiplosis venitalis Felt, 1914 | |
| Clinodiplosis verbenae Beutenmüller, 1907 | |
| Coccidomyia erii (Felt, 1912) | ⇒ Rhopalomyia erii Felt, 1912 |
| Coccidomyia pennsylvanica Felt, 1911 | |
| Coccodiplosis ananasae Hardy, 1960 | Hawai'i peperomia |
| Coccopsis marginata De Meijere, 1901 | Gall midge |
| Colomyia hordei (Barnes, 1928) | ⇒ Stackelbergiella hordei Barnes, 1927 |
| Colpodia temeritatis (Felt, 1908) | ⇒ Porricondylini temeritatis Felt, 1908 |
| Conarete crebra Pritchard, 1951 | Horn's milkvetch |
| Conarete eluta Pritchard, 1951 | Horn's milkvetch |
| Conarete eschata Pritchard, 1951 | Horn's milkvetch |
| Conarete texana Felt, 1913 | |
| Coniophora graminicola Nijveldt, 1959 | Gall midge |
| Contarinia acetosellae Rübsaamen, 1891 | Gall midge |
| Contarinia acuta Gagne, 1984 | Crenulate rhabdoweisia moss |
| Contarinia agrimoniae Felt, 1907 | Low philonotis moss |
| Contarinia albescentis Gagne, 1967 | |
| Contarinia albotarsa Felt, 1907 | |
| Contarinia ampelophila Felt, 1907 | Low philonotis moss |
| Contarinia baeri Prell, 1931 | European pine-needle midge |
| Contarinia balsamifera Felt, 1907 | Low philonotis moss |
| Contarinia bromicola Marikovskij ..., 1961 | Bromegrass seed midge |
| Contarinia castaneae Stebbins, 1910 | |
| Contarinia catalpae Comstock, 1881 | Catalpa midge |
| Contarinia cerasiphila Felt, 1911 | |
| Contarinia cerasiserotinae Osten Sacken, 1871 | |
| Contarinia citrina Osten Sacken, 1878 | Linden twig gall midge |
| Contarinia clarkei Felt, 1908 | |
| Contarinia clematidis Felt, 1908 | |
| Contarinia cockerelli Felt, 1918 | |
| Contarinia coloradensis Felt, 1912 | Pine bud gall midge |
| Contarinia constricta Condrashoff, 1961 | Douglas-fir needle midge |
| Contarinia cuniculator Condrashoff, 1961 | Douglas-fir needle midge |
| Contarinia divaricata Felt, 1908 | |
| Contarinia enceliae Felt, 1916 | |
| Contarinia excavationis Felt, 1907 | |
| Contarinia flavolinea Felt, 1908 | |
| Contarinia fraxini Felt, 1915 | |
| Contarinia geniculati Reuter, 1895 | Cocksfoot midge |
| Contarinia gossypii (Felt, 1908) | ⇒ Prodiplosis longifila Gagne, 1986 |
| Contarinia halliicola (Gagne, 1966) | ⇒ Contarinia wattsi Gagne, 1966 |
| Contarinia hudsonici Felt, 1908 | |
| Contarinia johnsoni Felt, 1909 | Grape blossom midge |
| Contarinia juniperina Felt, 1939 | Juniper midge |
| Contarinia maculipennis Felt, 1933 | Gall midge |
| Contarinia maculosa Felt, 1908 | |
| Contarinia nasturtii Kieffer, 1888 | Cabbage crowngall fly |
| Contarinia negundinis Gillette, 1890 | Box-elder bud gall midge |
| Contarinia obesa Felt, 1918 | |
| Contarinia opuntiae Felt, 1910 | |
| Contarinia oregonensis Foote, 1956 | Douglas-fir cone gall midge |
| Contarinia partheniicola Cockerell, 1900 | |
| Contarinia perfoliata Felt, 1908 | |
| Contarinia peritomatis Cockerell, 1913 | |
| Contarinia pseudotsugae Condrashoff, 1961 | Douglas-fir needle midge |
| Contarinia pyrivora Riley, 1886 | Gall midge |
| Contarinia quinquenotata F. Low, 1888 | Daylily gall midge |
| Contarinia racemi Stebbins, 1910 | |
| Contarinia rugosa Gagne, 1986 | Gall midge |
| Contarinia rumicis (Loew, 1850) | ⇒ Contarinia acetosellae Rübsaamen, 1891 |
| Contarinia sambucifoliae Felt, 1907 | Low philonotis moss |
| Contarinia schulzi Gagne, 1972 | Sunflower midge |
| Contarinia setigera Lintner, 1897 | |
| Contarinia sorghicola Coquillett, 1899 | Sorghum midge |
| Contarinia spiraeina Felt, 1911 | |
| Contarinia tecomae Felt, 1906 | |
| Contarinia texana Felt, 1921 | Gall midge |
| Contarinia thalactri Felt, 1907 | |
| Contarinia trifolii Felt, 1907 | Low philonotis moss |
| Contarinia truncata Felt, 1908 | |
| Contarinia vernalis Felt, 1908 | |
| Contarinia verrucicola Osten Sacken, 1875 | Linden Wart Gall Midge |
| Contarinia viatica Felt, 1908 | |
| Contarinia virginianiae Felt, 1906 | Chokecherry Midge |
| Contarinia viridiflava Felt, 1908 | |
| Contarinia washingtonensis Johnson, 1963 | Douglas-fir cone scale midge |
| Contarinia wattsi Gagne, 1966 | |
| Contarinia zauschneriae Felt, 1912 | |
| Coquillettomyia dentata Felt, 1908 | |
| Coquillettomyia lobata Felt, 1907 | |
| Coquillettomyia texana Felt, 1908 | |
| Cordylodiplosis molliterga Gagne, 1973 | |
| Cordylomyia brevicornis | |
| Cordylomyia sylvestris Felt, 1907 | |
| Corinthomyia brevicornis Felt, 1907 | |
| Craneiobia tuba Stebbins, 1910 | |
| Ctenodactylomyia watsoni Felt, 1915 | |
| Cystiphora schmidti Rübsaamen, 1914 | Chondrilla Gall Midge |
| Cystiphora sonchi Vallot, 1827 | |
| Cystiphora taraxaci Kieffer, 1888 | Biting midge |
| Dasineura aberrata Felt, 1908 | |
| Dasineura abiesemia Foote, 1956 | |
| Dasineura acerifolia Felt, 1907 | |
| Dasineura acerifoliae Felt, 1907 | |
| Dasineura aceris Shimer, 1868 | Soft maple leaf midge |
| Dasineura affinis Kieffer, 1886 | Midge |
| Dasineura albohirta Felt, 1908 | |
| Dasineura albovittata Walsh, 1864 | |
| Dasineura alopecuri Reuter, 1895 | Foxtail midge |
| Dasineura americana Felt, 1913 | |
| Dasineura anemone Felt, 1907 | |
| Dasineura antennata Felt, 1908 | |
| Dasineura apicata Felt, 1908 | |
| Dasineura aromaticae Felt, 1909 | |
| Dasineura attenuata Felt, 1908 | |
| Dasineura augusta Felt, 1908 | |
| Dasineura aurihirta Felt, 1908 | |
| Dasineura balsamifera Felt, 1908 | |
| Dasineura banksiae Kolesik, 2007 | |
| Dasineura bidentata Felt, 1907 | |
| Dasineura borealis Felt, 1907 | |
| Dasineura californica Felt, 1908 | |
| Dasineura canadensis Felt, 1907 | |
| Dasineura carbonaria Felt, 1907 | |
| Dasineura caricicola Kieffer, 1913 | |
| Dasineura cephalanthi Felt, 1908 | |
| Dasineura cercocarpi Felt, 1913 | |
| Dasineura cereocarpi Felt, 1913 | |
| Dasineura chinquapin Beutenmuller, 1907 | |
| Dasineura cirsioni Felt, 1908 | |
| Dasineura clematidis Felt, 1908 | |
| Dasineura collinsoniae Beutenmüller, 1908 | |
| Dasineura communis Felt, 1911 | Gouty vein midge |
| Dasineura corticis Felt, 1909 | |
| Dasineura crataegibedeguar Osten Sacken, 1878 | |
| Dasineura cyanococci Felt, 1907 | |
| Dasineura dentatae Stebbins, 1910 | |
| Dasineura denticulata Felt, 1907 | |
| Dasineura dielsi Rubsaamen, 1916 | |
| Dasineura emilyae Gagne, 1985 | |
| Dasineura eugeniae Felt, 1912 | |
| Dasineura filicae Felt, 1907 | |
| Dasineura filiciae Felt, 1907 | |
| Dasineura flavescens Felt, 1908 | |
| Dasineura flavicornis Felt, 1908 | |
| Dasineura flavoabdominalis Felt, 1908 | |
| Dasineura flavoscuta Felt, 1908 | |
| Dasineura florida Felt, 1908 | |
| Dasineura folliculi Felt, 1908 | |
| Dasineura fraxinifolia Felt, 1907 | |
| Dasineura fulva Felt, 1908 | |
| Dasineura gemmae Felt, 1909 | |
| Dasineura gentneri Pritchard, 1953 | Gall midge |
| Dasineura gibsoni Felt, 1911 | |
| Dasineura glandis Felt, 1908 | |
| Dasineura glechomae Kieffer, 1889 | |
| Dasineura gleditchiae Osten Sacken, 1866 | Honey-locust pod gall midge |
| Dasineura graminis Felt, 1908 | |
| Dasineura hirticornis Felt, 1909 | |
| Dasineura karnerensis Felt, 1908 | |
| Dasineura leguminicola Lintner, 1879 | Clover seed midge |
| Dasineura lepidii Felt, 1908 | |
| Dasineura lupini Felt, 1916 | |
| Dasineura lupinorum Gagne, 1993 | |
| Dasineura lysimachiae Beutenmüller, 1907 | |
| Dasineura mali Kieffer, 1904 | Apple leaf midge |
| Dasineura marginata Felt, 1908 | |
| Dasineura maritima Felt, 1909 | |
| Dasineura meibomiae Beutenmüller, 1907 | |
| Dasineura meliloti Felt, 1907 | |
| Dasineura modesta Felt, 1908 | |
| Dasineura multiannulata Felt, 1908 | |
| Dasineura multianulata Felt, 1908 | |
| Dasineura nodosa Felt, 1907 | |
| Dasineura olfieldii Kolesik, 2005 | |
| Dasineura oxycoccana Johnson, 1899 | Blueberry gall midge |
| Dasineura parthenocissi Stebbins, 1910 | |
| Dasineura pedalis Felt, 1908 | |
| Dasineura pellex Osten Sacken, 1862 | Ash Bullet Gall Midge |
| Dasineura pergandei Felt, 1911 | |
| Dasineura pini Felt, 1907 | |
| Dasineura piperitae Felt, 1908 | |
| Dasineura plicatrix Loew, 1850 | Blackberry leaf midge |
| Dasineura praecox Gagne, 1996 | |
| Dasineura pseudacaciae Fitch, 1859 | |
| Dasineura pseudococcus Thomas, 1890 | |
| Dasineura pudibunda Osten Sacken, 1862 | Hornbeam Leaf Gall Midge |
| Dasineura purpurea Felt, 1908 | |
| Dasineura pyri Bouche, 1847 | Gall midge |
| Dasineura quercina Felt, 1907 | |
| Dasineura rachiphaga Tripp, 1955 | |
| Dasineura radifolii Felt, 1909 | |
| Dasineura rhodophaga Coquillett, 1900 | Rose midge |
| Dasineura rosarum Hardy, 1850 | Gall midge |
| Dasineura rubiformis Kolesik, Ada..., 2005 | |
| Dasineura rufipedalis Felt, 1908 | |
| Dasineura salicifolia Felt, 1907 | |
| Dasineura salicifoliae Osten Sacken, 1866 | |
| Dasineura scutata Felt, 1908 | |
| Dasineura semenivora Beutenmüller, 1907 | Violet seed midge |
| Dasineura serrulatae Osten Sacken, 1862 | |
| Dasineura setosa Felt, 1907 | |
| Dasineura simillima Kieffer, 1913 | |
| Dasineura sisymbrii Schrank, 1803 | |
| Dasineura smilacifolia Felt, 1911 | |
| Dasineura smilacinae Bishop, 1911 | |
| Dasineura spiraeina Felt, 1908 | |
| Dasineura stanleyae Cockerell, 1914 | |
| Dasineura swainei Felt, 1914 | Spruce bud midge |
| Dasineura tortilis Bremi, 1847 | |
| Dasineura toweri Felt, 1909 | |
| Dasineura trifolii (Löw, 1874) | ⇒ Dasineura leguminicola Lintner, 1879 |
| Dasineura tuba Stebbins, 1910 | |
| Dasineura tumidosae Felt, 1908 | Ash Petiole Gall Midge |
| Dasineura ulmea Felt, 1908 | |
| Dasineura urnicola Osten Sacken, 1875 | |
| Dasineura vernalis Felt, 1908 | |
| Dasineura vitis Felt, 1908 | |
| Dasineura volantis Gagne, 2004 | |
| Dentifibula cocci (Felt, 1908) | ⇒ Dentifibula viburni Felt, 1907 |
| Dentifibula viburni Felt, 1907 | |
| Diadiplosis floridana Felt, 1915 | |
| Diadiplosis koebelei Koebele, 1893 | Citrophilus mealybug parasite |
| Diadiplosis pseudococci Felt, 1933 | |
| Diadiplosis pulvinariae Felt, 1912 | |
| Diadocidia (Adidocidia) trispinosa Polevoi, 1996 | |
| Diadocidia (Diadocidia) ferruginosa Meigen, 1830 | |
| Diadocidia borealis Coquillett, 1900 | |
| Diadocidia stanfordensis Arnaud & Hoyt, 1956 | |
| Diallactia gracilis Plakidas, 1999 | |
| Diarthronomyia artemisiae (Felt, 1908) | ⇒ Rhopalomyia pomum Gagne, 1975 |
| Diarthronomyia californica (Felt, 1912) | ⇒ Rhopalomyia clinata Gagne, 1975 |
| Dicerura elongata Borkent, 1990 | |
| Dicerura oregonensis Felt, 1919 | |
| Dicrodiplosis antennata Felt, 1912 | |
| Dicrodiplosis californica Felt, 1912 | Mealybug-Destroying Predaceous Gall Midge |
| Didactylomyia longimana Felt, 1908 | |
| Diplosis coloradella (Cockerell, 1904) | ⇒ Rhopalomyia coloradella Cockerell, 1904 |
| Diplosis partheniicola (Cockerell, 1900) | ⇒ Contarinia partheniicola Cockerell, 1900 |
| Dirhiza montana Felt, 1908 | |
| Dirhiza papillata Felt, 1914 | |
| Ditomyia euzona Loew, 1869 | Juniper globemallow |
| Ditomyia potomaca Fisher, 1941 | |
| Edestochilus allioides Pritchard, 1961 | |
| Edestosperma aristidae Gagne, 1969 | Wahlenberg's oncophorus moss |
| Edestospernia aristidae | |
| Eocincticornia australasiae Felt, 1915 | |
| Epidiplosis sayi Felt, 1908 | |
| Epimyia carolina Felt, 1911 | |
| Eucatocha barberi Felt, 1913 | |
| Eucatocha betsyae Pritchard, 1960 | Groundcover milkvetch |
| Eugeniamyia rufa (Williston, 1882) | ⇒ Brachyopa ferruginea Fallen, 1817 |
| Feltiella acarisuga Vallot, 1827 | |
| Feltiella acarivora (Felt, 1907) | ⇒ Cecidomyiidi acarinivora Tolg, 1921 |
| Feltiella acerifoliae (Felt, 1907) | ⇒ Feltiella pini Felt, 1907 |
| Feltiella americana (Felt, 1916) | ⇒ Feltiella acarisuga Vallot, 1827 |
| Feltiella borealis Felt, 1907 | |
| Feltiella carolina Felt, 1913 | |
| Feltiella davisi (Felt, 1915) | ⇒ Feltiella acarisuga Vallot, 1827 |
| Feltiella insularis Felt, 1913 | |
| Feltiella ithacae (Felt, 1926) | ⇒ Feltiella acarisuga Vallot, 1827 |
| Feltiella macgregori Felt, 1915 | |
| Feltiella minuta Felt, 1907 | |
| Feltiella occidentalis Felt, 1912 | |
| Feltiella pini Felt, 1907 | |
| Feltiella reducta Felt, 1908 | |
| Feltiella venatoria (Felt, 1917) | ⇒ Feltiella insularis Felt, 1913 |
| Ficiomyia birdi (Felt, 1934) | ⇒ Ficiomyia perarticulata Felt, 1922 |
| Ficiomyia perarticulata Felt, 1922 | |
| Forbesomyia atra Malloch, 1914 | Gray's bur cucumber |
| Gangromastix gongromastix | |
| Gephyraulus diplotaxis Solinas, 1982 | |
| Giardomyia emarginata (Felt, 1907) | ⇒ Giardomyia phosphila Felt, 1907 |
| Giardomyia fragariae Felt, 1907 | |
| Giardomyia furvescens Hardy, 1960 | Hawai'i peperomia |
| Giardomyia hudsonica Felt, 1908 | |
| Giardomyia menthae Felt, 1908 | |
| Giardomyia pallidithorax Hardy, 1960 | Hawai'i peperomia |
| Giardomyia phosphila Felt, 1907 | |
| Giardomyia photophila Felt, 1907 | |
| Giardomyia piperitae Felt, 1907 | |
| Glenodiplosis callipus Gagne, 1973 | |
| Gliaspilota glutinosa Osten Sacken, 1882 | Blue soldier fly |
| Gongrodiplosis latipes Felt, 1908 | |
| Gongromastix angustipennis Strobl, 1902 | |
| Gongromastix elongata Felt, 1908 | |
| Gongromastix epista Pritchard, 1951 | Horn's milkvetch |
| Gongromastix schalis Pritchard, 1951 | Horn's milkvetch |
| Halodiplosis sarcobati Felt, 1916 | |
| Haplusia funebris Plakidas, 2007 | |
| Haplusia fusca Felt, 1908 | |
| Haplusia rubra Felt, 1908 | |
| Harmandiola amisae Gagne, 1992 | |
| Harmandiola helena Felt, 1912 | |
| Harmandiola hudsoni Felt, 1907 | |
| Harmandiola reflexa Felt, 1913 | |
| Harmandiola stebbinsae Gagne, 1972 | |
| Hartigiola annulipes Hartig, 1839 | Beech Gall-midge |
| Helianthecis capitum Gagné, 2016 | |
| Henria hylecoites Pritchard, 1960 | |
| Henria quercivora Felt, 1912 | |
| Heterocontarinia spinosa Hardy, 1960 | Hawai'i peperomia |
| Heterogenella californica Jaschhof, 1997 | |
| Heterogenella cambrica Edwards, 1938 | |
| Heteropeza cathistes | |
| Heteropeza pygmaea Winnertz, 1846 | Coville's phlox |
| Heteropeza ulmi Felt, 1911 | |
| Heteropezina cathistes Pritchard, 1960 | Groundcover milkvetch |
| Holoneurus altifilus Felt, 1907 | |
| Holoneurus humilis Felt, 1908 | |
| Holoneurus strobilophilus (Foote, 1956) | ⇒ Asynapta strobilophila Foote, 1956 |
| Holoneurus tarsalis Felt, 1915 | |
| Homobremia insolens Felt, 1920 | |
| Hormomyia montana (Felt, 1921) | ⇒ Planetella montana Felt, 1921 |
| Hormonyia montana | |
| Hybolasioptera elymi Gagne, 1969 | Wahlenberg's oncophorus moss |
| Hyperdiplosis americana (Felt, 1908) | ⇒ Clinodiplosis americana Felt, 1911 |
| Hyperdiplosis bryanti Felt, 1913 | |
| Hyperdiplosis fungicola (Felt, 1911) | ⇒ Hyperdiplosis recurvata Felt, 1907 |
| Hyperdiplosis lobata Felt, 1907 | |
| Hyperdiplosis phlox (Greene, 1941) | ⇒ Clinodiplosis phlox Greene, 1941 |
| Hyperdiplosis recurvata Felt, 1907 | |
| Ipomyia bornemisszai Colless, 1965 | |
| Isocolpodia alta Felt, 1908 | |
| Isocolpodia diervillae Felt, 1907 | |
| Isocolpodia graminis Felt, 1907 | |
| Iteomyia salicifolia Felt, 1910 | |
| Iteomyia salicisverruca Osten Sacken, 1878 | Willow Leaf Gall Midge |
| Itonida citrulli (Felt, 1935) | ⇒ Prodiplosis citrulli Felt, 1935 |
| Itonida pugionis (Felt, 1911) | ⇒ Lestodiplosis pugionis Felt, 1911 |
| Jaapiella ivannikovi Fedotova, 1985 | Russian knapweed gall midge |
| Janetiella acerifolii Felt, 1907 | |
| Janetiella americana Felt, 1908 | |
| Janetiella asplenifolia Felt, 1907 | |
| Janetiella breviaria Felt, 1908 | |
| Janetiella brevicauda Felt, 1908 | |
| Janetiella coloradensis Felt, 1912 | |
| Janetiella inquilinus Felt, 1908 | |
| Janetiella sanguinea Felt, 1908 | |
| Janetiella siskiyou Felt, 1917 | |
| Janetiella tiliacea Felt, 1907 | |
| Johnsonomyia aldrichi (Malloch, 1916) | ⇒ Berkshiria albistylum Johnson, 1914 |
| Kalodiplosis floridana Felt, 1915 | |
| Karschomyia ectopia (Gagne, 1973) | ⇒ Karshomyia ectopia Gagne, 1973 |
| Karschomyia inusitata (Gagne, 1973) | ⇒ Karshomyia inusitata Gagne, 1973 |
| Karschomyia mira (Gagne, 1973) | ⇒ Karshomyia mira Gagne, 1973 |
| Karschomyia perissa (Gagne, 1973) | ⇒ Karshomyia perissa Gagne, 1973 |
| Karschomyia praecipua (Gagne, 1973) | ⇒ Karshomyia praecipua Gagne, 1973 |
| Karschomyiz mira | |
| Karshomyia acerina Felt, 1907 | |
| Karshomyia borealis Felt, 1920 | |
| Karshomyia caulicola Coquillett, 1895 | White-mold gall midge |
| Karshomyia curiosa Gagne, 1973 | |
| Karshomyia ectopia Gagne, 1973 | |
| Karshomyia insolens Felt, 1920 | |
| Karshomyia inusitata Gagne, 1973 | |
| Karshomyia mira Gagne, 1973 | |
| Karshomyia perissa Gagne, 1973 | |
| Karshomyia praecipua Gagne, 1973 | |
| Karshomyia quercina Felt, 1907 | |
| Karshomyia speciosa Felt, 1913 | |
| Karshomyia spinosa Felt, 1908 | |
| Karshomyia triangularis Felt, 1918 | |
| Karshomyia viburni Felt, 1907 | |
| Kiefferia rugosa | |
| Kronomyia populi Felt, 1911 | |
| Laisoptera asterspinosae | |
| Lamprodiplosis rhopalothrix Kieffer, 1904 | |
| Lasioptera abhamata Felt, 1907 | Low philonotis moss |
| Lasioptera arizonensis Felt, 1908 | |
| Lasioptera asterifoliae (Beutenmuller, 1907) | ⇒ Asteromyia laeviana Felt, 1907 |
| Lasioptera asterspinosae White, 1950 | |
| Lasioptera basiflava Felt, 1908 | |
| Lasioptera caryae Felt, 1907 | Low philonotis moss |
| Lasioptera cassiae (Felt, 1909) | ⇒ Neolasioptera cassiae Felt, 1909 |
| Lasioptera centerensis Felt, 1918 | |
| Lasioptera cinerea Felt, 1907 | Low philonotis moss |
| Lasioptera collinsonifolia Beutenmüller, 1908 | |
| Lasioptera colorati (Felt, 1918) | ⇒ Chilophaga colorati Felt, 1918 |
| Lasioptera corni Felt, 1907 | Low philonotis moss |
| Lasioptera cylindrigallae Felt, 1907 | Low philonotis moss |
| Lasioptera diplaci (Felt, 1912) | ⇒ Neolasioptera diplaci Felt, 1912 |
| Lasioptera ephedrae Cockerell, 1898 | |
| Lasioptera ephedricola Cockerell, 1902 | |
| Lasioptera excavata Felt, 1907 | Low philonotis moss |
| Lasioptera flavoventris Felt, 1908 | |
| Lasioptera fructuaria Felt, 1916 | Blueberry midge |
| Lasioptera hamata Felt, 1907 | |
| Lasioptera howardi Felt, 1921 | |
| Lasioptera humulicaulis Felt, 1907 | Low philonotis moss |
| Lasioptera inustorum (Felt, 1916) | ⇒ Calamomyia inustorum Felt, 1916 |
| Lasioptera kallstroemia Felt, 1935 | |
| Lasioptera lactucae Felt, 1907 | Low philonotis moss |
| Lasioptera lupini (Felt, 1908) | ⇒ Neolasioptera lupini Felt, 1908 |
| Lasioptera psederae (Felt, 1934) | ⇒ Neolasioptera psederae Felt, 1934 |
| Lasioptera querciflorae Felt, 1908 | |
| Lasioptera querciperda Felt, 1908 | |
| Lasioptera quercirami Felt, 1926 | Oeder's plagiopus moss |
| Lasioptera recessa Scudder, 1877 | |
| Lasioptera serotina Felt, 1908 | |
| Lasioptera solani Felt, 1907 | |
| Lasioptera solidaginis Osten Sacken, 1863 | Fanleaf hawthorn |
| Lasioptera spinulae (Felt, 1908) | ⇒ Neolasioptera spinulae Felt, 1908 |
| Lasioptera spiraeafolia Felt, 1909 | |
| Lasioptera tertia (Cockerell, 1898) | ⇒ Neolasioptera tertia Felt, 1898 |
| Lasioptera tibialis Felt, 1914 | |
| Lasioptera tripsaci (Felt, 1910) | ⇒ Chilophaga tripsaci Felt, 1910 |
| Lasioptera ventralis Say, 1824 | |
| Lasioptera verbenae (Felt, 1912) | ⇒ Neolasioptera verbenae Felt, 1912 |
| Lasioptera viburni Felt, 1907 | Low philonotis moss |
| Lasioptera vitis Osten Sacken, 1862 | Grape tomato gall midge |
| Lasioptera willistoni (Cockerell, 1898) | ⇒ Neolasioptera willistoni Cockerell, 1898 |
| Lasioptera ziziae Felt, 1908 | |
| Lasiopteridi amyotii Géhin, 1861 | |
| Lasiopteridi kaalae Hardy, 1960 | |
| Lasiopteridi torreyi Felt, 1925 | |
| Lasiopteryx coryli | |
| Ledomyia ampelophila Felt, 1908 | |
| Ledomyia arizonensis Felt, 1915 | |
| Ledomyia brevicauda Felt, 1908 | |
| Ledomyia carpini Felt, 1907 | |
| Ledomyia coryli Felt, 1907 | |
| Ledomyia crispata Felt, 1914 | |
| Ledomyia emilyae (Gagne, 1985) | ⇒ Dasineura emilyae Gagne, 1985 |
| Ledomyia flavotibialis Felt, 1907 | |
| Ledomyia maculosa Felt, 1908 | |
| Ledomyia minor Felt, 1907 | |
| Ledomyia mira Gagne, 1985 | |
| Ledomyia parma Felt, 1914 | |
| Ledomyia parva Gagne, 1985 | |
| Ledomyia phosphila Felt, 1907 | |
| Ledomyia pudorosa Felt, 1908 | |
| Ledomyia simulator Felt, 1908 | |
| Ledomyia unguicula Felt, 1908 | |
| Lestodiplosis acerina Felt, 1907 | |
| Lestodiplosis apocyniflorae Felt, 1908 | |
| Lestodiplosis asclepiae Felt, 1908 | |
| Lestodiplosis asteris Felt, 1907 | |
| Lestodiplosis basalis Felt, 1908 | |
| Lestodiplosis caliptera Fitch, 1845 | |
| Lestodiplosis carolinae Felt, 1907 | |
| Lestodiplosis cerasi Felt, 1908 | |
| Lestodiplosis cincta Felt, 1908 | |
| Lestodiplosis cinctipes Felt, 1914 | |
| Lestodiplosis clematiflorae Felt, 1908 | |
| Lestodiplosis cossae Shimer, 1869 | |
| Lestodiplosis crataegifolia Felt, 1908 | |
| Lestodiplosis decemmaculata Walsh, 1864 | |
| Lestodiplosis eupatorii Felt, 1907 | |
| Lestodiplosis fenestra Felt, 1908 | |
| Lestodiplosis filicis Felt, 1907 | |
| Lestodiplosis fimicola Hardy, 1960 | Hawai'i peperomia |
| Lestodiplosis flavomarginata Felt, 1907 | |
| Lestodiplosis florida Felt, 1908 | |
| Lestodiplosis floridana Johannsen, 1945 | Bractpod chickweed |
| Lestodiplosis fraxinifolia Felt, 1908 | |
| Lestodiplosis globosa Felt, 1908 | |
| Lestodiplosis hicoriae Felt, 1907 | |
| Lestodiplosis hopkinsi Felt, 1911 | |
| Lestodiplosis irenae Gagne, 1972 | |
| Lestodiplosis juniperina Felt, 1907 | |
| Lestodiplosis laticaulis Gagne, 1993 | |
| Lestodiplosis maculipennis Greene, 1941 | Slosson's woodfern |
| Lestodiplosis nigripennis Meigen, 1830 | |
| Lestodiplosis novangliae Felt, 1933 | |
| Lestodiplosis obtusilobata Hardy, 1960 | Hawai'i peperomia |
| Lestodiplosis platanifolia Felt, 1908 | |
| Lestodiplosis populifolia Felt, 1908 | |
| Lestodiplosis pugionis Felt, 1911 | |
| Lestodiplosis rudbeckiae Beutenmüller, 1907 | |
| Lestodiplosis rufa Felt, 1908 | |
| Lestodiplosis rugosae Felt, 1907 | |
| Lestodiplosis rumicis Felt, 1908 | |
| Lestodiplosis satiata Felt, 1920 | |
| Lestodiplosis scrophulariae Felt, 1907 | |
| Lestodiplosis septemmaculata Walsh, 1864 | |
| Lestodiplosis solidaginis Felt, 1908 | |
| Lestodiplosis spiraeafolia Felt, 1908 | |
| Lestodiplosis sylvestris Felt, 1907 | |
| Lestodiplosis taxiconis Foote, 1956 | Missouri fontinalis moss |
| Lestodiplosis triangularis Felt, 1907 | |
| Lestodiplosis tsugae Felt, 1907 | |
| Lestodiplosis venusta Gagne, 1999 | |
| Lestodiplosis verbenifolia Felt, 1908 | |
| Lestremia barberi (Felt, 1908) | ⇒ Allarete barberi Felt, 1908 |
| Lestremia cinerea Macquart, 1826 | Desert starvine |
| Lestremia clivicola Hardy, 1960 | Hawai'i peperomia |
| Lestremia elongata (Felt, 1908) | ⇒ Gongromastix elongata Felt, 1908 |
| Lestremia fenestrata Malloch, 1914 | |
| Lestremia franconiae (Felt, 1908) | ⇒ Lestremia cinerea Macquart, 1826 |
| Lestremia leucophaea Meigen, 1818 | Gall gnat |
| Lestremia palikuensis Hardy, 1960 | Hawai'i peperomia |
| Lestremia solidaginis Felt, 1907 | |
| Lithomyza condita Scudder, 1877 | |
| Lobodiplosis pseudococci Felt, 1933 | Gall midge |
| Lobopteromyia filicis Felt, 1907 | |
| Lopesia licaniae Gagne, 1996 | |
| Lophodiplosis trifida Gagne, 1997 | Melaleuca gall midge |
| Lygocecis packardi Felt, 1909 | |
| Lygocecis porterae Cockerell, 1904 | |
| Macrodiplosis antennata Felt, 1908 | |
| Macrodiplosis claytoniae Felt, 1907 | |
| Macrodiplosis erubescens Osten Sacken, 1862 | Marginal Leaf Fold Gall Midge |
| Macrodiplosis flavoscuta Felt, 1907 | |
| Macrodiplosis majalis Osten Sacken, 1878 | |
| Macrodiplosis niveipila Osten Sacken, 1862 | |
| Macrodiplosis putrida Felt, 1912 | |
| Macrodiplosis q-oruca Walsh, 1925 | |
| Macrodiplosis venae Felt, 1914 | |
| Macrolabis americana Dorchin, 2006 | |
| Mayetiola ammophila Gagne, 1975 | |
| Mayetiola ammophilae Gagne, 1975 | |
| Mayetiola californica (Felt, 1908) | ⇒ Oligotrophini californica Felt, 1908 |
| Mayetiola destructor Say, 1817 | Barley midge |
| Mayetiola floridensis Felt, 1921 | |
| Mayetiola kaalae (Hardy, 1960) | ⇒ Lasiopteridi kaalae Hardy, 1960 |
| Meunieriella aquilonia Gagne, 1984 | Crenulate rhabdoweisia moss |
| Miastor metraloas Meinert, 1864 | |
| Microcerata cockerelli (Felt, 1908) | ⇒ Anarete johnsoni Felt, 1908 |
| Micromya johannseni Felt, 1911 | |
| Micromya mana Pritchard, 1947 | Holmgren milk-vetch |
| Moehnia erema Pritchard, 1960 | |
| Monardia (Monardia) antennata Winnertz, 1870 | |
| Monardia (Monardia) lignivora Felt, 1907 | |
| Monardia (Xylopriona) atra Meigen, 1804 | |
| Monardia multiarticulata Felt, 1914 | |
| Monardia recondita Hardy, 1960 | Hawai'i peperomia |
| Monarthropalpus flavus Schrank, 1776 | Boxwood leafminer |
| Monepidosis carolinae Felt, 1907 | |
| Mycodiplosis conicola (Foote, 1956) | ⇒ Resseliella conicola Foote, 1956 |
| Mycodiplosis coryloides (Foote, 1956) | ⇒ Resseliella coryloides Foote, 1956 |
| Mycodiplosis emarginata Felt, 1907 | Low philonotis moss |
| Mycodiplosis explicata Felt, 1908 | |
| Mycodiplosis fungicola Felt, 1911 | Gall midge |
| Mycodiplosis fungiperda Felt, 1915 | |
| Mycodiplosis inimica Fitch, 1861 | |
| Mycodiplosis macgregori (Felt, 1915) | ⇒ Feltiella pini Felt, 1907 |
| Mycodiplosis pucciniacola Hardy, 1960 | |
| Mycodiplosis pucciniae Pritchard, 1948 | |
| Mycodiplosis rotundata Felt, 1908 | |
| Mycodiplosis thoracica Fitch, 1845 | |
| Mycophila barnesi (Edwards, 1938) | ⇒ Mycophila fungicola Felt, 1911 |
| Mycophila fungicola Felt, 1911 | Gall midge |
| Mycophila lampra Pritchard, 1947 | Holmgren milk-vetch |
| Mycophila speyeri Barnes, 1926 | Mushroom midge |
| Neocatocha marilandica Felt, 1912 | |
| Neocerata rhodophaga (Coquillett, 1900) | ⇒ Dasineura rhodophaga Coquillett, 1900 |
| Neocolpodia pinea Felt, 1907 | |
| Neolasioptera albipes Felt, 1918 | |
| Neolasioptera albitarsis Felt, 1907 | |
| Neolasioptera albolineata Felt, 1908 | |
| Neolasioptera allioniae Felt, 1911 | |
| Neolasioptera ambrosiae Felt, 1909 | |
| Neolasioptera angelicae Beutenmüller, 1908 | |
| Neolasioptera apocyni Felt, 1921 | |
| Neolasioptera argentisquama Felt, 1908 | |
| Neolasioptera asclepiae Felt, 1908 | |
| Neolasioptera baccharicola Gagne, 1971 | |
| Neolasioptera boehmeriae Beutenmüller, 1908 | |
| Neolasioptera brevis Gagne, 1984 | Crenulate rhabdoweisia moss |
| Neolasioptera cassiae Felt, 1909 | |
| Neolasioptera caulicola Felt, 1907 | |
| Neolasioptera celastri Felt, 1908 | |
| Neolasioptera cinerea Felt, 1907 | |
| Neolasioptera clematidis Felt, 1907 | |
| Neolasioptera convolvuli Felt, 1907 | |
| Neolasioptera cornicola Beutenmüller, 1907 | |
| Neolasioptera crotalariae Stebbins, 1910 | |
| Neolasioptera desmodii Felt, 1907 | |
| Neolasioptera diplaci Felt, 1912 | |
| Neolasioptera erigerontis Felt, 1907 | |
| Neolasioptera eupatoriflorae Felt, 1907 | |
| Neolasioptera eupatorii Felt, 1907 | |
| Neolasioptera farinosa Osten Sacken, 1862 | |
| Neolasioptera flavomaculata Felt, 1908 | |
| Neolasioptera fontagrensis Gagne, 1989 | |
| Neolasioptera fraxinifolia Felt, 1908 | |
| Neolasioptera galeopsidis Felt, 1909 | |
| Neolasioptera hamamelidis Felt, 1907 | |
| Neolasioptera helianthi Felt, 1907 | Sunflower seed midge |
| Neolasioptera hibisci Felt, 1907 | |
| Neolasioptera hirsuta Felt, 1908 | |
| Neolasioptera impatientifolia Felt, 1907 | |
| Neolasioptera incisa Plakidas, 1994 | |
| Neolasioptera lathami Gagne, 1971 | |
| Neolasioptera linderae Beutenmüller, 1907 | |
| Neolasioptera lupini Felt, 1908 | |
| Neolasioptera lycopi Felt, 1907 | |
| Neolasioptera major Felt, 1918 | |
| Neolasioptera menthae Felt, 1909 | |
| Neolasioptera mimuli Felt, 1908 | |
| Neolasioptera mitchellae Felt, 1908 | |
| Neolasioptera neofusca Felt, 1908 | |
| Neolasioptera nodulosa Beutenmüller, 1907 | Nodular Stem Gall Midge |
| Neolasioptera palmeri Felt, 1925 | |
| Neolasioptera palustris Felt, 1907 | |
| Neolasioptera perfoliata Felt, 1907 | Boneset Stem Midge |
| Neolasioptera pierrei Gagne, 1972 | |
| Neolasioptera potentillaecaulis Stebbins, 1910 | |
| Neolasioptera psederae Felt, 1934 | |
| Neolasioptera quercina Felt, 1907 | |
| Neolasioptera ramuscula Beutenmüller, 1907 | |
| Neolasioptera riparia Felt, 1909 | |
| Neolasioptera rostrata Gagne, 1989 | |
| Neolasioptera rudbeckiae Felt, 1908 | |
| Neolasioptera solani | |
| Neolasioptera spinulae Felt, 1908 | |
| Neolasioptera squamosa (Felt, 1908) | ⇒ Calamomyia squamosa Felt, 1908 |
| Neolasioptera tertia Felt, 1898 | |
| Neolasioptera triadenii Beutenmüller, 1908 | |
| Neolasioptera verbenae Felt, 1912 | |
| Neolasioptera verbesinae Möhn, 1964 | |
| Neolasioptera vernoniae Beutenmüller, 1907 | |
| Neolasioptera viburnicola Beutenmüller, 1907 | |
| Neolasioptera vitinea Felt, 1907 | Grape Leaf Petiole Gall |
| Neolasioptera willistoni Cockerell, 1898 | |
| Neostenoptera appalachiensis Plakidas & F..., 2016 | Paedogenetic gall midge |
| Neostenoptera hawaiiensis Plakidas, Ng..., 2022 | Paedogenic midge |
| Neosynepidosis furcata Felt, 1907 | |
| Neurolyga denningi Pritchard, 1947 | |
| Neurolyga fenestralis Rondani, 1840 | |
| Neurolyga fulva Felt, 1926 | |
| Neurolyga longipes Jaschhof, 1997 | |
| Neurolyga pritchardi Jaschhof, 1997 | |
| Neurolyga sylvestris Felt, 1907 | |
| Neurolyga texana Felt, 1908 | |
| Neurolyga truncata Felt, 1912 | |
| Neurolyga xylophila (Edwards, 1938) | ⇒ Neurolyga fenestralis Rondani, 1840 |
| Obolodiplosis robiniae Haldeman, 1847 | Black Locust Gall Midge |
| Odontodiplosis americana Felt, 1908 | |
| Odontodiplosis karnerensis Felt, 1907 | |
| Odontodiplosis montana Felt, 1908 | |
| Oligotrophidi collinsoniae Beutenmuller, 1908 | |
| Oligotrophidi grossulariae Fitch, 1855 | |
| Oligotrophini californica Felt, 1908 | |
| Oligotrophus apicis (Appleby & Ne..., 1965) | ⇒ Oligotrophus betheli Felt, 1912 |
| Oligotrophus betheli Felt, 1912 | Juniper tip midge |
| Oligotrophus cupressi Gagne, 1969 | |
| Oligotrophus papyriferae (Gagne, 1967) | ⇒ Apagodiplosis papyriferae Gagne, 1967 |
| Oligotrophus pattersoni (White, 1950) | ⇒ Walshomyia pattersoni White, 1950 |
| Oligotrophus skuhravae Roskam, 1977 | |
| Oligotrophus steenisi Roskam, 1977 | |
| Oligotrophus tarda Roskam, 1977 | |
| Oligotrophus tardus Roskam, 1977 | Biting midge |
| Ozirhincus millefolii Wachtl, 1884 | Gall midge |
| Paracolpodia capitata Felt, 1914 | |
| Paradiplosis obesa Felt, 1907 | |
| Paradiplosis partheniicola | |
| Paradiplosis tumifex Gagne, 1978 | Balsam gall midge |
| Parallelodiplosis abdominalis Felt, 1921 | |
| Parallelodiplosis acernea Felt, 1907 | |
| Parallelodiplosis aprilis Felt, 1912 | |
| Parallelodiplosis bimaculata Hardy, 1960 | Hawai'i peperomia |
| Parallelodiplosis carpinicola Kieffer, 1913 | |
| Parallelodiplosis caryae Felt, 1907 | |
| Parallelodiplosis corticis (Felt, 1915) | ⇒ Clinodiplosis corticis Felt, 1915 |
| Parallelodiplosis florida Felt, 1907 | |
| Parallelodiplosis hartmaniae Felt, 1921 | |
| Parallelodiplosis montana Felt, 1908 | |
| Parallelodiplosis nixoni Felt, 1908 | |
| Parallelodiplosis ramuli Felt, 1907 | |
| Parallelodiplosis rubrascuta Felt, 1907 | |
| Parallelodiplosis sarae Gagne, 1972 | |
| Parallelodiplosis spirae Felt, 1909 | |
| Parallelodiplosis subtruncata Felt, 1907 | Dogwood Eyespot Gall Midge |
| Parallelodiplosis tolhurstae Felt, 1908 | |
| Pararete elongata Felt, 1908 | |
| Parepidosis porrecta Felt, 1914 | |
| Parepidosis sylvestris Felt, 1914 | |
| Parwinnertzia notmani Felt, 1920 | |
| Peridiplosis quercina | |
| Peromyia anisotoma Mamaev, 1994 | |
| Peromyia borealis Felt, 1920 | |
| Peromyia caricis Kieffer, 1901 | |
| Peromyia modesta Felt, 1907 | |
| Peromyia monilis Mamaev, 1965 | |
| Peromyia neomexicana Felt, 1913 | |
| Peromyia ovalis Edwards, 1938 | |
| Peromyia palustris Kieffer, 1895 | |
| Peromyia photophila Felt, 1907 | |
| Perrisia vitis idaea (Kieffer, 1909) | ⇒ Dasineura vitisidaea Kieffer, 1909 |
| Phaenobremia doutti (Rondani, 1847) | ⇒ Aphidoletes aphidomyza Rondani, 1847 |
| Phytophaga americana | |
| Phytophaga californica | |
| Phytophaga celtiphyllia | |
| Phytophaga ulmi | |
| Phytophaga wellsi (Wells, 1916) | ⇒ Celticecis wellsi Wells, 1916 |
| Pilodiplosis helianthibulla Walsh, 1866 | |
| Pinyonia edulicola Gagne, 1970 | Pinyon spindle gall midge |
| Pitydiplosis packardi Felt, 1918 | |
| Planetella alexanderi Felt, 1921 | |
| Planetella americana Felt, 1907 | |
| Planetella atlantica Felt, 1908 | |
| Planetella caudata Felt, 1916 | |
| Planetella cincta Felt, 1921 | |
| Planetella coloradensis Cockerell, 1908 | |
| Planetella consobrina Felt, 1907 | |
| Planetella davisi Felt, 1921 | |
| Planetella dilatata Felt, 1921 | |
| Planetella fenestra Felt, 1915 | |
| Planetella fulva Felt, 1926 | |
| Planetella incisa Felt, 1921 | |
| Planetella johnsoni Felt, 1907 | |
| Planetella maxima Felt, 1921 | |
| Planetella modesta Felt, 1913 | |
| Planetella montana Felt, 1921 | |
| Planetella needhami Felt, 1907 | |
| Planetella palustris Felt, 1907 | |
| Planetella proteana Felt, 1914 | |
| Planetella pudica Felt, 1913 | |
| Planetella saturni Felt, 1914 | |
| Planetella shawi Felt, 1913 | |
| Platydiplosis nigricauda Gagne, 1973 | |
| Plectrodiplosis fascipennis Gagne, 1973 | |
| Polyardis adela Pritchard, 1947 | Holmgren milk-vetch |
| Polyardis aporia Pritchard, 1947 | Holmgren milk-vetch |
| Polyardis carpini Felt, 1907 | |
| Polyardis kasloensis Felt, 1908 | |
| Polyardis monotheca Edwards, 1938 | |
| Polyardis silvalis Rondani, 1840 | |
| Polyardis vitinea Felt, 1907 | |
| Polystepha aceris Felt, 1907 | |
| Polystepha americana Felt, 1908 | |
| Polystepha caryae Felt, 1908 | |
| Polystepha connecta Felt, 1908 | |
| Polystepha cornifolia Felt, 1907 | |
| Polystepha globosa Felt, 1909 | |
| Polystepha multifila Felt, 1907 | |
| Polystepha pilulae Beutenmüller, 1892 | Oak Leaf Gall Midge |
| Polystepha podagrae Felt, 1909 | |
| Polystepha pustulata Felt, 1909 | |
| Polystepha pustuloides Beutenmüller, 1907 | |
| Polystepha quercifolia Felt, 1908 | |
| Polystepha rhoina Felt, 1907 | |
| Polystepha serrata Felt, 1908 | |
| Polystepha simpla Felt, 1909 | |
| Polystepha sobrina Felt, 1907 | |
| Polystepha symmetrica Osten Sacken, 1862 | |
| Polystepha transversa Felt, 1907 | |
| Porricondyla americana Felt, 1914 | |
| Porricondyla antennata Felt, 1915 | |
| Porricondyla barberi Felt, 1908 | |
| Porricondyla borealis Felt, 1907 | Low philonotis moss |
| Porricondyla carolina Felt, 1908 | |
| Porricondyla dietzii Felt, 1912 | |
| Porricondyla dilatata Felt, 1908 | |
| Porricondyla graminis (Felt, 1907) | ⇒ Isocolpodia graminis Felt, 1907 |
| Porricondyla hamata (Felt, 1907) | ⇒ Claspettomyia hamata Felt, 1907 |
| Porricondyla juvenalis Felt, 1912 | |
| Porricondyla porrecta Felt, 1912 | |
| Porricondyla quercina Felt, 1907 | Low philonotis moss |
| Porricondyla recondita Plakidas, 2005 | |
| Porricondyla setosa Felt, 1914 | |
| Porricondyla spinigera Felt, 1920 | |
| Porricondyla sylvestris (Felt, 1907) | ⇒ Porricondyla barberi Felt, 1908 |
| Porricondyla tuckeri Felt, 1908 | |
| Porricondyla unidentata Parnell, 1971 | Sour cherry |
| Porricondyla varians Parnell, 1971 | |
| Porricondyla vernalis Felt, 1912 | |
| Porricondylini temeritatis Felt, 1908 | |
| Procystiphora coloradensis Felt, 1915 | |
| Procystiphora junci Felt, 1922 | |
| Procystiphora mangiferae Felt, 1927 | Gall midge |
| Prodiplosis citrulli Felt, 1935 | Cucurbit midge |
| Prodiplosis falcata Gagne, 1986 | |
| Prodiplosis floricola Felt, 1907 | |
| Prodiplosis longifila Gagne, 1986 | Bud midge |
| Prodiplosis morrisi Gagne, 1966 | Leafcurl midge |
| Prodiplosis myricae Beutenmüller, 1907 | |
| Prodiplosis platani Gagne, 1986 | |
| Prodiplosis vaccinii Felt, 1926 | Blueberry tip midge |
| Prodiplosis violicola Coquillett, 1900 | Violet gall midge |
| Protaplonyx hagani (Felt, 1916) | ⇒ Protaplonyx sarcobati Felt, 1914 |
| Protaplonyx sarcobati Felt, 1914 | |
| Pseudocamptomyia phosphila Felt, 1907 | |
| Putoniella gracilis Gagne, 1992 | |
| Rabdophaga absobrina Felt, 1907 | |
| Rabdophaga americana Felt, 1908 | |
| Rabdophaga californica Felt, 1908 | |
| Rabdophaga caudicis Gagne, 1986 | |
| Rabdophaga caulicola (Felt, 1908) | ⇒ Rabdophaga caudicis Gagne, 1986 |
| Rabdophaga cephalanthi Felt, 1908 | |
| Rabdophaga consobrina Felt, 1907 | |
| Rabdophaga cornuta Walsh, 1864 | |
| Rabdophaga essigi Felt, 1926 | |
| Rabdophaga frater Cockerell, 1890 | |
| Rabdophaga gemmae Felt, 1908 | |
| Rabdophaga globosa Felt, 1908 | |
| Rabdophaga hildebrandi Felt, 1928 | |
| Rabdophaga latebrosa Felt, 1909 | |
| Rabdophaga latipennis Felt, 1908 | |
| Rabdophaga occidentalis (Felt, 1926) | ⇒ Rabdophaga occidua Gange, 1989 |
| Rabdophaga occidua Gange, 1989 | |
| Rabdophaga perocculta Cockerell, 1904 | |
| Rabdophaga persimilis Felt, 1908 | |
| Rabdophaga podagrae Felt, 1908 | |
| Rabdophaga populi Felt, 1907 | |
| Rabdophaga porrecta Felt, 1915 | |
| Rabdophaga ramuscula Felt, 1908 | |
| Rabdophaga rigidae Osten Sacken, 1862 | Willow beaked gall midge |
| Rabdophaga rosaria (Loew, 1850) | ⇒ Rabdophaga strobilina Bremi, 1847 |
| Rabdophaga salicis (Schrank, 1803) | ⇒ Rabdophaga rigidae Osten Sacken, 1862 |
| Rabdophaga salicisbatatas Osten Sacken, 1878 | Potato Gall Midge |
| Rabdophaga salicisbrassicoides Packard, 1869 | Willow cabbagegall midge |
| Rabdophaga saliciscornu (Osten Sacken, 1878) | ⇒ Rabdophaga rigidae Osten Sacken, 1862 |
| Rabdophaga saliciscoryloides Osten Sacken, 1878 | |
| Rabdophaga salicisgnaphaloides Osten Sacken, 1878 | |
| Rabdophaga salicishordoides Osten Sacken, 1878 | |
| Rabdophaga salicisnodulus Osten Sacken, 1878 | Black hawthorn |
| Rabdophaga salicisrhodoides Osten Sacken, 1878 | |
| Rabdophaga salicisstrobiliscus Osten Sacken, 1878 | |
| Rabdophaga salicistriticoides Osten Sacken, 1878 | |
| Rabdophaga sodalitatis Felt, 1908 | |
| Rabdophaga strobilina Bremi, 1847 | |
| Rabdophaga strobiloides Osten Sacken, 1862 | Pine-cone gall midge |
| Rabdophaga terminalis Loew, 1850 | Bat-willow gall midge |
| Rabdophaga timberlakei Felt, 1916 | |
| Rabdophaga viva Rapp, 1946 | |
| Rabdophaga walshii Felt, 1908 | |
| Resseliella aurata Felt, 1908 | |
| Resseliella californica Felt, 1914 | |
| Resseliella cincta Felt, 1918 | |
| Resseliella clavula Beutenmüller, 1892 | Dogwood club gall midge |
| Resseliella conicola Foote, 1956 | |
| Resseliella coryli Felt, 1907 | |
| Resseliella coryloides Foote, 1956 | |
| Resseliella hudsoni Felt, 1907 | |
| Resseliella liriodendri Osten Sacken, 1862 | Tulip Tree Leaf Spot Gall Midge |
| Resseliella maccus Loew, 1862 | |
| Resseliella perplexa Felt, 1908 | |
| Resseliella pinifoliae Felt, 1936 | |
| Resseliella radicis Felt, 1936 | |
| Resseliella silvana Felt, 1908 | |
| Resseliella tulipiferae Osten Sacken, 1862 | |
| Rhabdophaga californica Felt, 1908 | |
| Rhabdophaga cephalanthi (Felt, 1908) | ⇒ Dasineura cephalanthi Felt, 1908 |
| Rhabdophaga elymi (Felt, 1909) | ⇒ Mayetiola destructor Say, 1817 |
| Rhabdophaga occidentalis (Felt, 1908) | ⇒ Mayetiola destructor Say, 1817 |
| Rhizomyia absobrina Felt, 1907 | |
| Rhizomyia cincta Felt, 1915 | |
| Rhizomyia fraxinifolia Felt, 1907 | |
| Rhizomyia hirta Felt, 1911 | |
| Rhizomyia hispida Felt, 1907 | |
| Rhizomyia tiliacea Felt, 1907 | |
| Rhizomyia ungulata Felt, 1907 | |
| Rhizomyia vitis Felt, 1907 | |
| Rhopalomyia abnormis Felt, 1908 | |
| Rhopalomyia albipennis Felt, 1908 | |
| Rhopalomyia alticola Cockerell, 1890 | |
| Rhopalomyia ambrosiae Gagne, 1975 | |
| Rhopalomyia ampullaria Felt, 1916 | |
| Rhopalomyia antennariae Wheeler, 1889 | |
| Rhopalomyia anthoides Gagne, 1983 | |
| Rhopalomyia anthophila Osten Sacken, 1869 | |
| Rhopalomyia apicata Felt, 1908 | |
| Rhopalomyia arcuata Felt, 1907 | Low philonotis moss |
| Rhopalomyia astericaulis Felt, 1907 | Low philonotis moss |
| Rhopalomyia asteriflorae Felt, 1907 | Low philonotis moss |
| Rhopalomyia audibertiae Felt, 1907 | Low philonotis moss |
| Rhopalomyia baccharis Felt, 1908 | Coyote Brush Twisted Stem Gall Midge |
| Rhopalomyia betheliana Cockerell, 1909 | |
| Rhopalomyia bigeloviae Cockerell, 1889 | |
| Rhopalomyia bigeloviaestrobiloides Townsend, 1894 | |
| Rhopalomyia bigelovioides Felt, 1908 | |
| Rhopalomyia brevibulla Gagne, 1983 | |
| Rhopalomyia bulbula Felt, 1908 | |
| Rhopalomyia californica Felt, 1908 | Coyote Brush Bud Gall Midge |
| Rhopalomyia calvipomum Gagne, 1983 | |
| Rhopalomyia capitata Felt, 1908 | Giant Goldenrod Bunch Gall Midge |
| Rhopalomyia carolina Felt, 1908 | |
| Rhopalomyia chrysanthemi Ahlberg, 1939 | Chrysanthemum gall midge |
| Rhopalomyia chrysopsidis Loew, 1862 | |
| Rhopalomyia chrysothamni Felt, 1916 | |
| Rhopalomyia clarkei Felt, 1907 | Low philonotis moss |
| Rhopalomyia clinata Gagne, 1975 | |
| Rhopalomyia cockerelli Felt, 1915 | |
| Rhopalomyia coloradella Cockerell, 1904 | |
| Rhopalomyia conica Gagne, 1983 | |
| Rhopalomyia cramboides Gagne, 1983 | |
| Rhopalomyia crassulina Cockerell, 1908 | |
| Rhopalomyia cruziana Felt, 1908 | |
| Rhopalomyia culmata Gagne, 1983 | |
| Rhopalomyia ericameriae Felt, 1916 | |
| Rhopalomyia erigerontis Felt, 1916 | |
| Rhopalomyia erii Felt, 1912 | |
| Rhopalomyia euthamiae Stebbins, 1910 | |
| Rhopalomyia felti Johnson, 1925 | |
| Rhopalomyia floccosa Felt, 1916 | |
| Rhopalomyia florella Gagne, 1983 | |
| Rhopalomyia fusiformae Felt, 1907 | Goldentop Sessile Gall Midge |
| Rhopalomyia gemmaria Stebbins, 1910 | |
| Rhopalomyia gnaphalodis Felt, 1911 | |
| Rhopalomyia gossypina Gagne, 1983 | |
| Rhopalomyia grindeliae Felt, 1916 | |
| Rhopalomyia grossulariae Felt, 1911 | Gooseberry bud midge |
| Rhopalomyia gutierreziae Cockerell, 1901 | |
| Rhopalomyia hirtibulla Gagne, 1983 | |
| Rhopalomyia hirticaulis Gagne, 1983 | |
| Rhopalomyia hirtipes Osten Sacken, 1862 | |
| Rhopalomyia hirtipomum Gagne, 1983 | |
| Rhopalomyia inquisitor Felt, 1908 | |
| Rhopalomyia lanceolata Felt, 1908 | |
| Rhopalomyia lateriflori Felt, 1908 | |
| Rhopalomyia lignea Gagne, 1983 | |
| Rhopalomyia lignitubus Gagne, 1983 | |
| Rhopalomyia lobata Felt, 1908 | |
| Rhopalomyia lonicera Felt, 1925 | |
| Rhopalomyia major Felt, 1907 | Low philonotis moss |
| Rhopalomyia mammilla Gagne, 1983 | |
| Rhopalomyia medusa Gagne, 1983 | |
| Rhopalomyia medusirrasa Gagne, 1983 | |
| Rhopalomyia nucula Gagne, 1983 | |
| Rhopalomyia obovata Gagne, 1983 | |
| Rhopalomyia occidentalis Felt, 1916 | |
| Rhopalomyia palustris Felt, 1908 | |
| Rhopalomyia pedicellata Felt, 1908 | Goldentop Pedicellate Gall Midge |
| Rhopalomyia pini Felt, 1907 | Low philonotis moss |
| Rhopalomyia pomum Gagne, 1975 | Sponge Gall Midge |
| Rhopalomyia racemicola Felt, 1907 | Low philonotis moss |
| Rhopalomyia rugosa Gagne, 1983 | |
| Rhopalomyia salviae Felt, 1916 | |
| Rhopalomyia solidaginis Loew, 1862 | Goldenrod Bunch Gall |
| Rhopalomyia strobiligemma Stebbins, 1910 | |
| Rhopalomyia subhumilis Gagne, 1977 | Schist cynodontium moss |
| Rhopalomyia sulcata Gagne, 1995 | |
| Rhopalomyia tetradymia Felt, 1925 | |
| Rhopalomyia thompsoni Felt, 1907 | Low philonotis moss |
| Rhopalomyia truncata (Felt, 1907) | ⇒ Rhopalomyia felti Johnson, 1925 |
| Rhopalomyia truncula (Foote, 1965) | ⇒ Rhopalomyia felti Johnson, 1925 |
| Rhopalomyia tubulus Gagne, 1983 | |
| Rhopalomyia tumidibulla Gagne, 1983 | |
| Rhopalomyia tumidicaulis Gagne, 1983 | |
| Rhopalomyia utahensis Felt, 1916 | |
| Rhopalomyia weldi Felt, 1921 | |
| Rubsaamenia cactophila (Samuelson, 1964) | ⇒ Winnertzia cactophila Samuelson, 1964 |
| Rubsaamenia keeni (Foote, 1956) | ⇒ Asynapta hopkinsi Felt, 1935 |
| Ruebsaamenia cactophila Samuelson, 1964 | |
| Sackenomyia acerifoliae Felt, 1907 | |
| Sackenomyia commota Gagne, 1975 | |
| Sackenomyia packardi (Felt, 1909) | ⇒ Lygocecis packardi Felt, 1909 |
| Sackenomyia porterae | |
| Sackenomyia viburnifolia (Felt, 1909) | ⇒ Sackenomyia commota Gagne, 1975 |
| Schistoneurus pectinata Felt, 1907 | |
| Schizomyia altifila Felt, 1907 | |
| Schizomyia caryaecola Felt, 1908 | |
| Schizomyia eupatoriflorae Beutenmüller, 1907 | Boneset Flower Gall Midge |
| Schizomyia impatientis Osten Sacken, 1862 | Jewelweed Gall Midge |
| Schizomyia macrofila Felt, 1907 | |
| Schizomyia petiolicola Felt, 1908 | |
| Schizomyia racemicola Osten Sacken, 1862 | |
| Schizomyia rivinae Felt, 1908 | |
| Schizomyia rubi Felt, 1907 | |
| Schizomyia speciosa Felt, 1914 | |
| Schizomyia umbellicola Osten Sacken, 1878 | |
| Schizomyia viburni Felt, 1908 | |
| Schizomyia viticola Osten Sacken, 1862 | Grape Tube Gallmaker |
| Schizomyia vitiscoryloides Packard, 1869 | |
| Schizomyia vitispomum Osten Sacken, 1878 | |
| Semudobia betulae Winnertz, 1853 | Gall midge |
| Semudobia steenisi (Roskam, 1977) | ⇒ Oligotrophus steenisi Roskam, 1977 |
| Sequoiomyia taxodii Felt, 1916 | |
| Silvestrina cincta Felt, 1907 | |
| Silvestrina koebelei (Felt, 1932) | ⇒ Diadiplosis koebelei Koebele, 1893 |
| Silvestriola apiphila Felt, 1907 | |
| Silvestriola cincta Felt, 1907 | |
| Sitodiplosis mosellana Géhin, 1857 | Orange wheat blossom midge |
| Skuhraviana triangulifera Mamaev, 1963 | |
| Solntsevia maculata Felt, 1908 | |
| Spurgia capitigena Bremi, 1847 | Gall midge |
| Spurgia esulae Gagne, 1990 | Leafy Spurge Gall Midge |
| Stackelbergiella hordei Barnes, 1927 | |
| Stefaniola gloma Mohn, 1971 | |
| Stefaniola harenosa Möhn, 1971 | |
| Stenodiplosis sorghicola Coquillett, 1899 | Durra gall midge |
| Stephomyia eugeniae Felt, 1913 | |
| Stomatosema obscurum Mamaev, 1967 | |
| Stomatosema robustum Felt, 1920 | |
| Stomatosema trichodera Gagne, 1975 | |
| Strobliella intermedia Kieffer, 1898 | |
| Symmerus coqulus Garrett, 1925 | |
| Symmerus lautus Loew, 1870 | |
| Symmerus uncata Munroe, 1974 | |
| Symmerus vockerothi Munroe, 1974 | |
| Tanaodiplosis androgynes Felt, 1908 | |
| Taxodiomyia cupressi Schweinitz, 1822 | |
| Taxodiomyia cupressiananassa Osten Sacken, 1878 | Cypress twig gall midge |
| Taxodiomyia taxodii Felt, 1911 | Cypress Leaf Gall Midge |
| Tetraneuromyia apicalis Felt, 1914 | |
| Tetraneuromyia mediana Felt, 1914 | |
| Tetraneuromyia nobilis Felt, 1913 | |
| Thaumadiplosis magnicauda Gagne, 1973 | |
| Thecodiplosis brachynteroides Osten Sacken, 1862 | |
| Thecodiplosis piniradiatae Snow & Mills, 1900 | Monterey-pine midge |
| Thecodiplosis piniresinosae Kearby, 1963 | Red pine needle midge |
| Thecodiplosis pinirigidae Packard, 1878 | Pine-needle gall fly |
| Thecodiplosis quercifolia | |
| Thripsobremia quercifolia Felt, 1908 | |
| Thripsobremia thripivora Gagne, 1993 | |
| Tinconaria albescentis (Gagne, 1967) | ⇒ Contarinia albescentis Gagne, 1967 |
| Trichopteromyia denticauda Gagne, 1985 | |
| Trichopteromyia modesta Williston, 1896 | Hogvine |
| Trisopsis hibisci Felt, 1935 | |
| Trisopsis incisa Felt, 1907 | |
| Trisopsis obscura Felt, 1908 | |
| Trisopsis oleae Kieffer, 1912 | Gall midge |
| Tritozyga sackeni Felt, 1911 | |
| Trogodiplosis flexuosa Gagne, 1985 | |
| Tropidiplosis pectinata Gagne, 1973 | |
| Trotteria karnerensis Felt, 1908 | |
| Vitisiella brevicauda | Grape Tumid Gallmaker Midge |
| Walshomyia cupressi (Gagne, 1969) | ⇒ Oligotrophus cupressi Gagne, 1969 |
| Walshomyia insignis Felt, 1921 | |
| Walshomyia juniperina Felt, 1908 | |
| Walshomyia pattersoni White, 1950 | |
| Walshomyia sabinae Patterson, 1919 | Virginia rose |
| Walshomyia texana Felt, 1916 | |
| Wasmanilla clauda | |
| Wasmanniella clauda Pritchard, 1951 | Horn's milkvetch |
| Winnertzia ampelophila Felt, 1907 | |
| Winnertzia arizonensis (Kieffer, 1913) | ⇒ Winnertzia arizoniensis Felt, 1908 |
| Winnertzia arizoniensis Felt, 1908 | |
| Winnertzia cactophila Samuelson, 1964 | |
| Winnertzia carpini Felt, 1907 | Low philonotis moss |
| Winnertzia fungicola Felt, 1921 | |
| Winnertzia hudsonici Felt, 1908 | |
| Winnertzia palustris Felt, 1915 | |
| Winnertzia pinicorticis Felt, 1907 | Low philonotis moss |
| Winnertzia rubida Felt, 1908 | |
| Winnertzia solidaginis Felt, 1907 | Low philonotis moss |
| Xipholasioptera ensata Gagne, 1995 | |
| Xylodiplosis longistylus Gagne, 1985 | |
| Xylopriona articulosa Felt, 1908 | |
| Xylopriona atra (Meigen, 1804) | ⇒ Monardia atra Meigen, 1804 |
| Xylopriona crebra Pritchard, 1947 | Holmgren milk-vetch |
| Xylopriona toxicodendri Felt, 1907 | |
| Youngomyia podophyllae Felt, 1907 | |
| Youngomyia quercina Felt, 1911 | |
| Youngomyia vernoniae (Felt, 1911) | ⇒ Youngomyia podophyllae Felt, 1907 |
| Zeuxidiplosis giardi Kieffer, 1896 | Gall midge |
