| Allodia (Allodia) anglofennica Edwards, 1921 | Graceful asterella |
| Allodia (Allodia) lugens Wiedemann, 1817 | |
| Allodia (Allodia) ornaticollis Meigen, 1818 | |
| Allodia (Allodia) simplex Zaitzev, 1983 | Prickly gilia |
| Allodia (Allodia) truncata Edwards, 1921 | Graceful asterella |
| Allodia (Brachycampta) adunca Zaitzev, 1992 | |
| Allodia (Brachycampta) elevata Zaitzev, 1984 | California prickly phlox |
| Allodia (Brachycampta) pistillata Lundström, 1911 | |
| Allodia acutaria Johannsen, 1912 | |
| Allodia californiensis Zaitzev, 1984 | |
| Allodia cincta Van Duzee, 1928 | Parish's yampah |
| Allodia conspicua Zaitzev, 1983 | Prickly gilia |
| Allodia hastata Zaitzev, 1992 | |
| Allodia hirticauda Van Duzee, 1928 | Parish's yampah |
| Allodia idahoensis Zaitzev, 1984 | California prickly phlox |
| Allodia prominens Zaitzev, 1983 | Prickly gilia |
| Allodia pseudobarbata Zaitzev, 1992 | |
| Allodia racemosa Zaitzev, 1992 | |
| Allodia subelata Malloch, 1923 | Laysan bur cucumber |
| Allodia unicolor Lundbeck, 1898 | |
| Allodiopsis (Allodiopsis) domestica Meigen, 1830 | |
| Allodiopsis (Notolopha) cristata (Staeger, 1840) | ⇒ Notolopha cristata Stæger, 1840 |
| Allodiopsis akeleyi Johannsen, 1912 | |
| Allodiopsis diffissa Johannsen, 1912 | |
| Anatella affinis Fisher, 1938 | |
| Anatella ciliata Winnertz, 1863 | Spreading phlox |
| Anatella difficilis Garrett, 1925 | |
| Anatella silvestris Johannsen, 1909 | Panal |
| Anatella simpatica Dziedzicki, 1923 | |
| Brachypeza brevitibia Van Duzee, 1928 | Parish's yampah |
| Brachypeza dentica Guthrie, 1917 | |
| Brachypeza divergens Johannsen, 1912 | |
| Brachypeza errans Garrett, 1925 | |
| Brachypeza subarmata Zaitzev, 1989 | |
| Bradysia bellingeri Shaw, 1953 | Paiute suncup |
| Bradysia biformis Lundbeck, 1898 | |
| Bradysia bispina Fisher, 1938 | |
| Bradysia browni Shaw, 1935 | |
| Bradysia caldaria Lintner, 1895 | |
| Bradysia coprophila Lintner, 1895 | House plant gnat |
| Bradysia cucumeris Johannsen, 1912 | |
| Bradysia dichaeta Shaw, 1941 | |
| Bradysia diluta Johannsen, 1912 | Keyhole wasp |
| Bradysia dolens Johannsen, 1912 | |
| Bradysia ericia Pettey, 1918 | |
| Bradysia expolita Coquillett, 1900 | |
| Bradysia falcata Pettey, 1918 | |
| Bradysia farri (Shaw, 1953) | ⇒ Lycoriella farri Shaw, 1953 |
| Bradysia felti Pettey, 1918 | |
| Bradysia fochi Pettey, 1918 | |
| Bradysia forcipulata Lundbeck, 1898 | |
| Bradysia fulvicauda Felt, 1898 | |
| Bradysia fumida Johannsen, 1912 | |
| Bradysia grandis Pettey, 1918 | |
| Bradysia groenlandica Holmgren, 1872 | |
| Bradysia hamata Pettey, 1918 | |
| Bradysia hartii Johannsen, 1912 | |
| Bradysia hastata Johannsen, 1912 | |
| Bradysia impatiens Johannsen, 1912 | Dark-winged fungus gnat |
| Bradysia iridipennis Zetterstedt, 1838 | Fungus gnat |
| Bradysia joffrei Pettey, 1918 | |
| Bradysia johannseni Enderlein, 1912 | Recurved sphagnum |
| Bradysia jucunda Johannsen, 1912 | |
| Bradysia kaiseri Shaw, 1941 | |
| Bradysia lobosa Pettey, 1918 | |
| Bradysia longispina Pettey, 1918 | |
| Bradysia luravi Johannsen, 1929 | |
| Bradysia macfarlanei Jones, 1920 | |
| Bradysia macrodon (Frey, 1948) | ⇒ Camptochaeta delicata Lengersdorf, 1935 |
| Bradysia macroptera Pettey, 1918 | |
| Bradysia meigeni Rübsaamen, 1894 | |
| Bradysia mellea Johannsen, 1912 | |
| Bradysia mesochra Shaw, 1941 | |
| Bradysia munda Johannsen, 1912 | |
| Bradysia neglecta Johannsen, 1912 | |
| Bradysia nemoralis Meigen, 1818 | |
| Bradysia nervosa Meigen, 1818 | |
| Bradysia nigripes (Meigen, 1830) | ⇒ Bradysia strigata Staeger, 1840 |
| Bradysia ocellaris Comstock, 1882 | Dark-winged fungus gnat |
| Bradysia ovata Pettey, 1918 | |
| Bradysia paradichaeta Shaw, 1941 | |
| Bradysia parilis Johannsen, 1912 | |
| Bradysia parva Holmgren, 1869 | |
| Bradysia penna Pettey, 1918 | |
| Bradysia petaini Pettey, 1918 | |
| Bradysia picea Rübsaamen, 1894 | |
| Bradysia pilata Pettey, 1918 | |
| Bradysia pollicis Pettey, 1918 | |
| Bradysia prolifica Felt, 1898 | |
| Bradysia quadrispinosa Pettey, 1918 | |
| Bradysia reynoldsi Metz, 1938 | |
| Bradysia sexdentata Pettey, 1918 | |
| Bradysia silvestrii Kieffer, 1910 | |
| Bradysia spinata Pettey, 1918 | |
| Bradysia strigata Staeger, 1840 | |
| Bradysia subgrandis Shaw, 1941 | |
| Bradysia tilicola Loew, 1850 | |
| Bradysia trifurca Pettey, 1918 | |
| Bradysia tritici (Coquillett, 1895) | ⇒ Bradysia ocellaris Comstock, 1882 |
| Bradysia trivialis Johannsen, 1912 | |
| Bradysia unguicauda Malloch, 1923 | |
| Bradysia varians Johannsen, 1912 | |
| Brevicornu (Brevicornu) kingi Edwards, 1925 | |
| Brevicornu affinis Zaitzev, 1988 | California prickly phlox |
| Brevicornu arctica Lundström, 1913 | |
| Brevicornu beata Johannsen, 1912 | |
| Brevicornu bella Johannsen, 1912 | |
| Brevicornu bipartitum Lastovka & M..., 1974 | Leadwort |
| Brevicornu californiense Zaitzev, 1985 | California prickly phlox |
| Brevicornu callida Johannsen, 1912 | |
| Brevicornu canadense Zaitzev, 1988 | California prickly phlox |
| Brevicornu cognata Ostroverchova, 1979 | |
| Brevicornu crassicornis Stannius, 1831 | |
| Brevicornu cristatum Zaitzev, 1985 | California prickly phlox |
| Brevicornu cuspidatum Zaitzev, 1992 | |
| Brevicornu delita Johannsen, 1912 | |
| Brevicornu disjunctum Zaitzev, 1988 | California prickly phlox |
| Brevicornu elata Johannsen, 1912 | |
| Brevicornu eximium Zaitzev, 1988 | California prickly phlox |
| Brevicornu fissicauda Lundström, 1911 | |
| Brevicornu griseicollis Staeger, 1840 | |
| Brevicornu improvisum Zaitzev, 1992 | |
| Brevicornu melanderi Zaitzev, 1988 | California prickly phlox |
| Brevicornu nigrofusca Lundström, 1909 | |
| Brevicornu occidentale Zaitzev, 1988 | California prickly phlox |
| Brevicornu pedatum Zatizev, 1988 | California prickly phlox |
| Brevicornu proprium Zaitzev, 1992 | |
| Brevicornu sericoma Meigen, 1830 | |
| Brevicornu setulosum Zaitzev, 1988 | California prickly phlox |
| Brevicornu subarcticum Zaitzev, 1992 | |
| Brevicornu subfissicauda Zaitzev, 1985 | California prickly phlox |
| Cordyla confera Garrett, 1925 | |
| Cordyla gracilis Fisher, 1938 | |
| Cordyla manca Johannsen, 1912 | |
| Cordyla neglecta Johannsen, 1912 | |
| Cordyla parva Garrett, 1925 | |
| Cordyla recens Johannsen, 1912 | |
| Cordyla scita Johannsen, 1912 | |
| Cordyla scutellata Garrett, 1925 | |
| Cordyla verio Garrett, 1925 | |
| Cordyla volucris Johannsen, 1909 | Panal |
| Corynoptera lugens Johannsen, 1912 | |
| Corynoptera luteola Pettey, 1918 | |
| Corynoptera macclurei Shaw, 1941 | |
| Corynoptera macrodon Frey, 1948 | |
| Corynoptera perfecta Pettey, 1918 | |
| Corynoptera subtrivialis Pettey, 1918 | |
| Dynatosoma aurei Guthrie, 1917 | |
| Dynatosoma bifasciata Walker, 1848 | |
| Dynatosoma coquilletti Landrock, 1918 | Little deserttrumpet |
| Dynatosoma fulvidum Coquillett, 1895 | |
| Dynatosoma fuscicornis Meigen, 1818 | |
| Dynatosoma grandis Garrett, 1925 | |
| Dynatosoma huliphila Garrett, 1925 | |
| Dynatosoma montanus Garrett, 1925 | |
| Dynatosoma obscurum Zaitzev, 1988 | |
| Dynatosoma occidentale Zaitzev, 1988 | |
| Dynatosoma placidum Johannsen, 1912 | |
| Dynatosoma rotundatum Zaitzev, 1988 | |
| Epicypta aterrima Zetterstedt, 1852 | |
| Epicypta helvopicta Chandler, 1981 | |
| Epicypta lepida Chandler, 1981 | |
| Epicypta limnophila Chandler, 1981 | |
| Epicypta punctum Stannius, 1831 | |
| Epicypta scatophora (Perris, 1849) | ⇒ Epicypta limnophila Chandler, 1981 |
| Epicypta testata (Edwards, 1925) | ⇒ Platurocypta testata Edwards, 1925 |
| Epidapus johannseni Shaw, 1953 | |
| Exechia abrupta Johannsen, 1912 | |
| Exechia absoluta Johannsen, 1912 | |
| Exechia absurda Johannsen, 1912 | |
| Exechia adamsi Laffoon, 1965 | |
| Exechia aequalis Van Duzee, 1928 | Parish's yampah |
| Exechia alexanderi Shaw, 1951 | Narrowleaf suncup |
| Exechia angustata Van Duzee, 1928 | Parish's yampah |
| Exechia assidua Johannsen, 1912 | |
| Exechia attrita Johannsen, 1912 | |
| Exechia auxiliaria Johannsen, 1912 | |
| Exechia bella Johannsen, 1912 | |
| Exechia bellula Johannsen, 1912 | |
| Exechia bicincta Staeger, 1840 | |
| Exechia bifurcata Fisher, 1934 | |
| Exechia bilobata Shaw, 1951 | Narrowleaf suncup |
| Exechia borealis (Van Duzee, 1928) | ⇒ Exechia spinuligera Lundstrom, 1912 |
| Exechia brevipetiolata Van Duzee, 1928 | Parish's yampah |
| Exechia capillata Johannsen, 1912 | |
| Exechia captiva Johannsen, 1912 | |
| Exechia cincinnata Johannsen, 1912 | |
| Exechia clepsydra Fisher, 1937 | Compact conardia moss |
| Exechia contaminata Winnertz, 1863 | Spreading phlox |
| Exechia frigida Boheman, 1865 | |
| Exechia lundstroemi Landrock, 1923 | Tripod buckwheat |
| Exechia nativa Johannsen, 1912 | |
| Exechia nitidicollis Lundström, 1913 | |
| Exechia noctivaga Van Duzee, 1928 | Parish's yampah |
| Exechia nugatoria Johannsen, 1912 | |
| Exechia obediens Johannsen, 1912 | |
| Exechia ovata (Fisher, 1934) | ⇒ Pseudexechia ovata Fisher, 1934 |
| Exechia palmata Johannsen, 1912 | |
| Exechia perspicua Johannsen, 1912 | |
| Exechia plebeia Walker, 1848 | |
| Exechia pollex Shaw, 1935 | Redclay suncup |
| Exechia pratti Shaw, 1951 | Narrowleaf suncup |
| Exechia quadrata Johannsen, 1912 | |
| Exechia repanda Johannsen, 1912 | |
| Exechia satiata Johannsen, 1912 | |
| Exechia shawi Fisher, 1934 | |
| Exechia spinuligera Lundstrom, 1912 | |
| Exechia subligulata Shaw, 1952 | Robust suncup |
| Exechia umbrosa Van Duzee, 1928 | Parish's yampah |
| Exechia unicincta Van Duzee, 1928 | Parish's yampah |
| Exechia unicolor Van Duzee, 1928 | Parish's yampah |
| Exechiopsis aviculata Shaw, 1935 | |
| Exechiopsis nexa Johannsen, 1912 | |
| Exechiopsis nugax Johannsen, 1912 | |
| Exechiopsis umbratica Aldrich, 1897 | |
| Lycoriella (Hemineurina) cochleata Rübsaamen, 1898 | |
| Lycoriella (Hemineurina) inflata Winnertz, 1867 | |
| Lycoriella (Hemineurina) modesta Staeger, 1840 | Fly |
| Lycoriella (Hemineurina) venosa (Staeger, 1840) | ⇒ Lycoriella inflata Winnertz, 1867 |
| Lycoriella (Hemineurina) vitticollis Holmgren, 1883 | |
| Lycoriella (Lycoriella) agraria (Felt, 1898) | ⇒ Lycoriella ingenua Dufour, 1839 |
| Lycoriella (Lycoriella) ingenua Dufour, 1839 | Dark-winged fungus gnat |
| Lycoriella (Lycoriella) mali (Fitch, 1856) | ⇒ Lycoriella ingenua Dufour, 1839 |
| Lycoriella (Lycoriella) sativae Johannsen, 1912 | |
| Lycoriella brevipetiolata Shaw, 1941 | |
| Lycoriella caesar Johannsen, 1929 | |
| Lycoriella conglomerata Pettey, 1918 | |
| Lycoriella farri Shaw, 1953 | |
| Lycoriella fatigans Johannsen, 1912 | |
| Lycoriella jauva Rapp, 1941 | |
| Lycoriella multiseta Felt, 1898 | Mushroom sciarid |
| Lycoriella permutata Lundbeck, 1901 | |
| Lycoriella polychaeta Pettey, 1918 | |
| Lycoriella similans Johannsen, 1925 | |
| Lycoriella trifolii Pettey, 1918 | |
| Macrobrachius producta Johannsen, 1912 | |
| Mycetophila (Abmyceta) recta Johannsen, 1912 | |
| Mycetophila alata Guthrie, 1917 | Pendant kihi fern |
| Mycetophila alberta Curran, 1927 | |
| Mycetophila alea Laffoon, 1965 | |
| Mycetophila alexanderi Laffoon, 1957 | |
| Mycetophila analis (Coquillett, 1901) | ⇒ Exechia adamsi Laffoon, 1965 |
| Mycetophila arnaudi Laffoon, 1957 | |
| Mycetophila attonsa Laffoon, 1957 | |
| Mycetophila bentincki Laffoon, 1957 | |
| Mycetophila bipunctata Loew, 1869 | Juniper globemallow |
| Mycetophila bohartorum Laffoon, 1947 | |
| Mycetophila browningi Laffoon, 1957 | |
| Mycetophila byersi Laffoon, 1957 | |
| Mycetophila capreolata Laffoon, 1957 | |
| Mycetophila carruthi Shaw, 1951 | Narrowleaf suncup |
| Mycetophila caudata Staeger, 1840 | Blue weed |
| Mycetophila caurina Laffoon, 1957 | |
| Mycetophila cavillator Laffoon, 1957 | |
| Mycetophila celator Laffoon, 1957 | |
| Mycetophila chamberlini Laffoon, 1957 | |
| Mycetophila cingulum Meigen, 1830 | Stalkless yellowcress |
| Mycetophila clavata Van Duzee, 1928 | Parish's yampah |
| Mycetophila comata Laffoon, 1957 | |
| Mycetophila concinna Laffoon, 1957 | |
| Mycetophila consonans Laffoon, 1957 | |
| Mycetophila contigua Walker, 1848 | Ashy milkweed |
| Mycetophila crassiseta Laffoon, 1957 | |
| Mycetophila cruciator Laffoon, 1957 | |
| Mycetophila curviseta Lundstrom, 1911 | |
| Mycetophila dentata Lundström, 1913 | |
| Mycetophila devia (Laffoon, 1957) | ⇒ Mycetophila curviseta Lundstrom, 1911 |
| Mycetophila discors Laffoon, 1957 | |
| Mycetophila dziedzickii Chandler, 1977 | |
| Mycetophila edura Johannsen, 1912 | |
| Mycetophila exstincta Loew, 1869 | Juniper globemallow |
| Mycetophila faceta Laffoon, 1957 | |
| Mycetophila falcata Johannsen, 1912 | |
| Mycetophila fascinator Laffoon, 1957 | |
| Mycetophila fatua Johannsen, 1912 | |
| Mycetophila favonica Chandler, 1993 | |
| Mycetophila finlandica Edwards, 1913 | Elegant asterella |
| Mycetophila fisherae Laffoon, 1957 | |
| Mycetophila foecunda Johannsen, 1912 | |
| Mycetophila frustrator Laffoon, 1957 | |
| Mycetophila fungorum De Geer, 1776 | |
| Mycetophila ghanii Shaw, 1951 | Narrowleaf suncup |
| Mycetophila hiulca Laffoon, 1957 | |
| Mycetophila ichneumonea Say, 1823 | |
| Mycetophila illudens Laffoon, 1957 | |
| Mycetophila impellans Johannsen, 1912 | |
| Mycetophila itascae Laffoon, 1957 | |
| Mycetophila jucunda Johannsen, 1912 | |
| Mycetophila jugata Johannsen, 1912 | |
| Mycetophila laeta Walker, 1848 | Ashy milkweed |
| Mycetophila laffooni Lastovca, 1972 | California sea lavender |
| Mycetophila lenis Johannsen, 1912 | |
| Mycetophila lenta Johannsen, 1912 | |
| Mycetophila limata Laffoon, 1957 | |
| Mycetophila luctuosa Meigen, 1830 | Stalkless yellowcress |
| Mycetophila mitis Johannsen, 1912 | |
| Mycetophila moravica Landrock, 1925 | Contra Costa buckwheat |
| Mycetophila napaea Laffoon, 1957 | |
| Mycetophila neofungorum Chandler, 1993 | |
| Mycetophila nubila (Say, 1829) | ⇒ Manota nubila Say, 1929 |
| Mycetophila obscura (Walker, 1848) | ⇒ Mycetophila dziedzickii Chandler, 1977 |
| Mycetophila ocellus Walker, 1848 | Ashy milkweed |
| Mycetophila parva Walker, 1848 | Ashy milkweed |
| Mycetophila parvimaculata Van Duzee, 1928 | Parish's yampah |
| Mycetophila paula Loew, 1869 | |
| Mycetophila paxillata Laffoon, 1957 | |
| Mycetophila pectita Johannsen, 1912 | |
| Mycetophila percursa Laffoon, 1957 | |
| Mycetophila perita Johannsen, 1912 | |
| Mycetophila pictula Meigen, 1830 | Stalkless yellowcress |
| Mycetophila pinguis Loew, 1869 | Juniper globemallow |
| Mycetophila procera Loew, 1869 | Juniper globemallow |
| Mycetophila propinqua Walker, 1848 | Ashy milkweed |
| Mycetophila recula Laffoon, 1957 | |
| Mycetophila riparia Chandler, 1993 | |
| Mycetophila ruficollis Meigen, 1818 | |
| Mycetophila scitula Laffoon, 1957 | |
| Mycetophila scotica Edwards, 1941 | |
| Mycetophila seclusa Laffoon, 1957 | |
| Mycetophila sepulta Laffoon, 1957 | |
| Mycetophila sertata Laffoon, 1957 | |
| Mycetophila shawi Laffoon, 1957 | |
| Mycetophila sierrae Laffoon, 1957 | |
| Mycetophila sigillata Dziedzicki, 1884 | |
| Mycetophila sigmoides Loew, 1869 | Juniper globemallow |
| Mycetophila signatoides Dziedzicki, 1884 | |
| Mycetophila sordida Wulp, 1874 | Lesser yellowthroat gilia |
| Mycetophila spleniata Laffoon, 1957 | |
| Mycetophila stolida Walker, 1856 | Engelmann's milkweed |
| Mycetophila stricklandi Laffoon, 1957 | |
| Mycetophila strigata Staeger, 1840 | Blue weed |
| Mycetophila subita Laffoon, 1957 | |
| Mycetophila thioptera Shaw, 1940 | Lewis River suncup |
| Mycetophila trinotata Staeger, 1840 | Blue weed |
| Mycetophila uncinata Laffoon, 1957 | |
| Mycetophila unipunctata Meigen, 1818 | |
| Mycetophila vegeta Laffoon, 1957 | |
| Mycetophila venusta Laffoon, 1957 | |
| Mycetophila verecunda Laffoon, 1957 | |
| Mycetophila vesca Laffoon, 1957 | |
| Mycetophila wirthi Laffoon, 1957 | |
| Notolopha cristata Stæger, 1840 | |
| Odontosciara fulviventris Wiedemann, 1821 | |
| Phronia agilis Gagne, 1975 | |
| Phronia avida Gagne, 1975 | |
| Phronia bicolor (Dziedzicki, 1889) | ⇒ Phronia coritanica Chandler, 1992 |
| Phronia braueri Dziedzicki, 1889 | |
| Phronia caliginosa Dziedzicki, 1889 | |
| Phronia cinerascens Winnertz, 1863 | Spreading phlox |
| Phronia conformis Walker, 1856 | |
| Phronia cordata Lundström, 1914 | |
| Phronia coritanica Chandler, 1992 | |
| Phronia cornuta Lundström, 1914 | |
| Phronia cupida Gagne, 1975 | |
| Phronia despecta Walker, 1848 | |
| Phronia digitata Hackman, 1970 | |
| Phronia disgrega Dziedzicki, 1889 | |
| Phronia distincta Hackman, 1970 | |
| Phronia dryas Gagne, 1975 | |
| Phronia effusa Gagne, 1975 | |
| Phronia egregia Dziedzicki, 1889 | |
| Phronia exigua Zetterstedt, 1852 | |
| Phronia felicis Gagne, 1975 | |
| Phronia flavicollis Winnertz, 1863 | |
| Phronia flavipes Winnertz, 1863 | Spreading phlox |
| Phronia forcipula Winnertz, 1863 | Spreading phlox |
| Phronia fusciventris Van Duzee, 1928 | Parish's yampah |
| Phronia gracilis Hackman, 1970 | |
| Phronia hilaris Gagne, 1975 | |
| Phronia incerta Adams, 1907 | |
| Phronia interstincta Dziedzicki, 1975 | |
| Phronia jacosa Gagne, 1975 | |
| Phronia laffooni Gagne, 1975 | |
| Phronia lutescens Hackman, 1970 | |
| Phronia matilei Hackman, 1972 | |
| Phronia melica Gagne, 1975 | |
| Phronia mutabilis Dziedzicki, 1889 | |
| Phronia nebulosa Johannsen, 1912 | |
| Phronia nigricornis Zetterstedt, 1852 | |
| Phronia nigripalpis Lundström, 1909 | |
| Phronia obtusa Winnertz, 1863 | Spreading phlox |
| Phronia oreas Gagne, 1975 | |
| Phronia persimilis Hackman, 1970 | |
| Phronia petulans Dziedzicki, 1889 | |
| Phronia portschinskyi Dziedzicki, 1889 | |
| Phronia similis Johannsen, 1912 | |
| Phronia strenua (Winnertz, 1863) | ⇒ Phronia flavicollis Winnertz, 1863 |
| Phronia sudetica Dziedzicki, 1889 | |
| Phronia sylvatica Dziedzicki, 1889 | |
| Phronia taczanowskyi (Dziedzicki, 1889) | ⇒ Phronia obtusa Winnertz, 1863 |
| Phronia tenebrosa Coquillett, 1904 | |
| Phronia tenuis Winnertz, 1863 | Spreading phlox |
| Phronia terrea Gagne, 1975 | |
| Phronia tiefii Dziedzicki, 1889 | |
| Phronia versuta Gagne, 1975 | |
| Phronia willistoni Dziedzicki, 1889 | |
| Phytosciara (Dolichosciara) flavipes Meigen, 1804 | Fungus Gnat |
| Plastosciara arenicola Steffan, 1984 | Elliott's croton |
| Plastosciara johnstoni Shaw, 1935 | |
| Platurocypta punctum Stannius, 1831 | |
| Platurocypta testata Edwards, 1925 | |
| Pnyxia scabiei Hopkins, 1895 | Potato scab gnat |
| Pseudexechia canalicula Johannsen, 1912 | |
| Pseudexechia ovata Fisher, 1934 | |
| Pseudobrachypeza bulbosa Johannsen, 1912 | |
| Rymosia beckeri Shaw, 1951 | Narrowleaf suncup |
| Rymosia coheri Shaw, 1951 | Narrowleaf suncup |
| Rymosia dietrichi Shaw, 1951 | Narrowleaf suncup |
| Rymosia faceta Sherman, 1921 | Walker's suncup |
| Rymosia filipes Loew, 1869 | Juniper globemallow |
| Rymosia imitator Johannsen, 1912 | |
| Rymosia inflata Johannsen, 1912 | |
| Rymosia lacki Edwards, 1935 | |
| Rymosia parvicauda Van Duzee, 1928 | Parish's yampah |
| Rymosia pectinata Sherman, 1921 | Walker's suncup |
| Rymosia pediformis Shaw, 1951 | Narrowleaf suncup |
| Rymosia plumosa Van Duzee, 1928 | Parish's yampah |
| Rymosia prolixa Sherman, 1921 | Walker's suncup |
| Rymosia seminigra Sherman, 1921 | Walker's suncup |
| Rymosia sericea Say, 1824 | |
| Rymosia serripes Johannsen, 1912 | |
| Rymosia spinicauda Van Duzee, 1928 | Parish's yampah |
| Rymosia triangularis Shaw, 1935 | Redclay suncup |
| Scatopsciara (Scatopsciara) atomaria Zetterstedt, 1851 | |
| Scatopsciara (Scatopsciara) nacta Johannsen, 1912 | |
| Scatopsciara (Xenopygina) radialis Shaw, 1934 | |
| Scatopsciara actuosa Johannsen, 1912 | |
| Scatopsciara acuta Johannsen, 1912 | |
| Scatopsciara dendrotica Steffan, 1968 | |
| Scatopsciara vivida (Winnertz, 1867) | ⇒ Scatopsciara atomaria Zetterstedt, 1851 |
| Sceptonia autumnalis Garrett, 1925 | |
| Sceptonia autumnals (Garrett, 1925) | ⇒ Sceptonia autumnalis Garrett, 1925 |
| Sceptonia johannsoni Garrett, 1925 | |
| Schwenkfeldina dux Johannsen, 1912 | |
| Schwenkfeldina imitans Johannsen, 1912 | |
| Schwenkfeldina tridentata Rübsaamen, 1898 | |
| Sciara abbreviata Walker, 1848 | |
| Sciara abdita Johannsen, 1912 | |
| Sciara arcuata Garrett, 1925 | |
| Sciara atrata (Say, 1824) | ⇒ Bradysia meigeni Rübsaamen, 1894 |
| Sciara attenuata Rübsaamen, 1898 | |
| Sciara borealis Rübsaamen, 1898 | |
| Sciara cingulata Rübsaamen, 1894 | Longleaf cologania |
| Sciara clavata Garrett, 1925 | |
| Sciara congregata Johannsen, 1914 | Aptenia |
| Sciara cylindrica Pettey, 1918 | Vermont blackberry |
| Sciara delessei Seguy, 1953 | |
| Sciara diderma Garrett, 1925 | |
| Sciara dimidiata Say, 1832 | |
| Sciara diota Garrett, 1925 | |
| Sciara dives Johannsen, 1912 | |
| Sciara exigua Say, 1824 | |
| Sciara exilis ♰ Say, 1829 | |
| Sciara femorata Say, 1823 | |
| Sciara forceps (Pettey, 1918) | ⇒ Pseudosciara forceps Pettey, 1918 |
| Sciara fraterna Say, 1824 | |
| Sciara fuliginosus Fitch, 1856 | |
| Sciara fulviventris (Wiedemann, 1821) | ⇒ Odontosciara fulviventris Wiedemann, 1821 |
| Sciara fumatella (Lundbeck, 1898) | ⇒ Lycoriella modesta Staeger, 1840 |
| Sciara futilis Johannsen, 1912 | |
| Sciara glacialis (Rübsaamen, 1898) | ⇒ Lycoriella permutata Lundbeck, 1901 |
| Sciara globosa Pettey, 1918 | Vermont blackberry |
| Sciara habilis Johannsen, 1912 | |
| Sciara hebes Loew, 1870 | |
| Sciara humicola (Lundbeck, 1898) | ⇒ Bradysia forcipulata Lundbeck, 1898 |
| Sciara inconstans Fitch, 1856 | Fickle midge |
| Sciara lurida Walker, 1848 | |
| Sciara multisetifera Pettey, 1918 | Vermont blackberry |
| Sciara ochrolabis Loew, 1869 | Juniper globemallow |
| Sciara perpusilla Walker, 1848 | |
| Sciara polita Say, 1824 | |
| Sciara psittacus Pettey, 1918 | Vermont blackberry |
| Sciara pulicaria Meigen, 1818 | |
| Sciara robusta (Walker, 1848) | ⇒ Bradysia strigata Staeger, 1840 |
| Sciara rotundipennis Macquart, 1838 | |
| Sciara sciophila Loew, 1869 | Juniper globemallow |
| Sciara scita Johannsen, 1912 | |
| Sciara septentrionalis Rübsaamen, 1898 | |
| Sciara townesi Shaw, 1935 | Redclay suncup |
| Sciara unicorn Garrett, 1925 | |
| Sciara vicina Johannsen, 1912 | |
| Sciara vulgaris Fitch, 1856 | |
| Trichonta amica Gagne, 1981 | |
| Trichonta atricauda Zetterstedt, 1852 | |
| Trichonta beata Gagne, 1981 | |
| Trichonta bezzii Landrock, 1913 | Dogtongue buckwheat |
| Trichonta bicolor Landrock, 1912 | Dogtongue buckwheat |
| Trichonta brevicauda Lundström, 1906 | Missouri violet |
| Trichonta chaoi Shaw, 1951 | Narrowleaf suncup |
| Trichonta cincta Johannsen, 1912 | |
| Trichonta clara Gagne, 1981 | |
| Trichonta clemens Gagne, 1981 | |
| Trichonta comica Gagne, 1981 | |
| Trichonta delicata Gagne, 1981 | |
| Trichonta eximia Gagne, 1981 | |
| Trichonta facilis Gagne, 1981 | |
| Trichonta falcata Lundström, 1911 | |
| Trichonta festa Gagne, 1981 | |
| Trichonta fissicauda (Zetterstedt, 1852) | ⇒ Trichonta atricauda Zetterstedt, 1852 |
| Trichonta flavicauda Lundström, 1914 | |
| Trichonta foeda Loew, 1869 | Juniper globemallow |
| Trichonta fragilis Gagne, 1981 | |
| Trichonta fusciventris Van Duzee, 1928 | Parish's yampah |
| Trichonta generosa Gagne, 1981 | |
| Trichonta gentilis Gagne, 1981 | |
| Trichonta girschneri Landrock, 1912 | Thymeleaf buckwheat |
| Trichonta hamata Mik, 1880 | |
| Trichonta justa Gagne, 1981 | |
| Trichonta languida Gagne, 1981 | |
| Trichonta lucida Gagne, 1981 | |
| Trichonta melanura (Staeger, 1840) | ⇒ Trichonta atricauda Zetterstedt, 1852 |
| Trichonta merita Gagne, 1981 | |
| Trichonta obesa Winnertz, 1863 | Spreading phlox |
| Trichonta patens Johannsen, 1912 | |
| Trichonta perspicua Wulp, 1881 | Lesser yellowthroat gilia |
| Trichonta pulchra Gagne, 1981 | |
| Trichonta salva Gagne, 1981 | |
| Trichonta secura Gagne, 1981 | |
| Trichonta sedata Gagne, 1981 | |
| Trichonta sedula Gagne, 1981 | |
| Trichonta serena Gagne, 1981 | |
| Trichonta subfusca Lundström, 1909 | |
| Trichonta terminalis Walker, 1856 | |
| Trichonta venosa Staeger, 1840 | |
| Trichonta vitta Meigen, 1830 | |
| Trichonta vulcani Dziedzicki, 1889 | |
| Trichonta vulgaris Loew, 1869 | Juniper globemallow |
| Trichosia hebes (Loew, 1869) | ⇒ Sciara hebes Loew, 1870 |
| Zygomyia bifasciata (Garrett, 1925) | ⇒ Zygomyia bifasciola Matile, 1989 |
| Zygomyia bifasciola Matile, 1989 | |
| Zygomyia christata Garrett, 1925 | |
| Zygomyia christulata Garrett, 1925 | |
| Zygomyia coxalis Garrett, 1925 | |
| Zygomyia ignobilis Loew, 1869 | Juniper globemallow |
| Zygomyia interrupta Malloch, 1914 | Gray's bur cucumber |
| Zygomyia ornata Loew, 1869 | Juniper globemallow |
| Zygomyia pilosa Garrett, 1925 | |
| Zygomyia vara Staeger, 1840 | |
| Zygoneura flavicoxa Johannsen, 1912 | |
| Zygoneura johannseni Shaw, 1941 | Wingfruit suncup |
