| Allodia (Allodia) anglofennica Edwards, 1921 | Graceful asterella |
| Allodia (Allodia) embla Hackman, 1971 | |
| Allodia (Allodia) lugens Wiedemann, 1817 | |
| Allodia (Allodia) lundstroemi Edwards, 1921 | |
| Allodia (Allodia) ornaticollis Meigen, 1818 | |
| Allodia (Allodia) pyxidiiformis (Zaitzev, 1983) | ⇒ Allodia zaitzevi Kurina, 1998 |
| Allodia (Allodia) septentrionalis Hackman, 1971 | Ray spiked fern |
| Allodia (Allodia) simplex Zaitzev, 1983 | Prickly gilia |
| Allodia (Allodia) truncata Edwards, 1921 | Graceful asterella |
| Allodia (Allodia) tuomikoskii Hackman, 1971 | Ray spiked fern |
| Allodia (Allodia) zaitzevi Kurina, 1998 | |
| Allodia (Brachycampta) adunca Zaitzev, 1992 | |
| Allodia (Brachycampta) alternans Zetterstedt, 1838 | |
| Allodia (Brachycampta) czernyi Landrock, 1912 | |
| Allodia (Brachycampta) elevata Zaitzev, 1984 | California prickly phlox |
| Allodia (Brachycampta) foliifera Strobl, 1910 | |
| Allodia (Brachycampta) neglecta Edwards, 1925 | |
| Allodia actuaria Johannsen, 1912 | |
| Allodia californensis Zaitzev, 1983 | California prickly phlox |
| Allodia callida Johannsen, 1912 | |
| Allodia callidum Johannsen, 1912 | |
| Allodia cincta Van Duzee, 1928 | Parish's yampah |
| Allodia conspicua Zaitzev, 1983 | Prickly gilia |
| Allodia delita Johannsen, 1912 | |
| Allodia elata Johannsen, 1912 | |
| Allodia embia Hackman, 1971 | Ray spiked fern |
| Allodia hirticauda Van Duzee, 1928 | Parish's yampah |
| Allodia idahoensis Zaitzev, 1984 | California prickly phlox |
| Allodia prominens Zaitzev, 1983 | Prickly gilia |
| Allodia promivens | |
| Allodia pseudobarbata Zaitzev, 1992 | |
| Allodia racemosa Zaitzev, 1992 | |
| Allodia subelata Malloch, 1923 | Laysan bur cucumber |
| Allodiopsis (Allodiopsis) rustica Edwards, 1941 | |
| Allodiopsis (Notolopha) cristata (Staeger, 1840) | ⇒ Notolopha cristata Stæger, 1840 |
| Allodiopsis maculosa (Meigen, 1818) | ⇒ Myrosia maculosa Meigen, 1818 |
| Anatella affinis Fisher, 1938 | |
| Anatella ankeli Plassmann, 1977 | |
| Anatella aquila Zaitzev, 1989 | |
| Anatella arnaudi Zaitzev, 2000 | |
| Anatella flavomaculata Edwards, 1925 | |
| Anatella lenis Dziedzicki, 1923 | |
| Anatella minuta Stæger, 1840 | |
| Anatella pseudogibba Plassmann, 1977 | |
| Anatella tacita ♰ S. H. Scudder, 1890 | |
| Anatella unguigera Edwards, 1921 | |
| 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 bishopi Steffan, 1973 | |
| Bradysia bispina Fisher, 1938 | |
| Bradysia browni Shaw, 1935 | |
| Bradysia caldaria Lintner, 1895 | |
| Bradysia cellarum Frey, 1948 | |
| Bradysia conglomerata Pettey, 1918 | |
| Bradysia coprophila Lintner, 1895 | House plant gnat |
| Bradysia cucumeris Johannsen, 1912 | |
| Bradysia dichaeta Shaw, 1941 | |
| Bradysia diluta Johannsen, 1912 | Keyhole wasp |
| Bradysia dux Johannsen, 1912 | |
| Bradysia ericia Pettey, 1918 | |
| Bradysia excelsa Menzel & Mohrig, 1998 | |
| Bradysia expolita Coquillett, 1900 | |
| Bradysia falcata Pettey, 1918 | |
| Bradysia farri (Shaw, 1953) | ⇒ Lycoriella farri Shaw, 1953 |
| Bradysia fatigans Johannsen, 1912 | |
| Bradysia felti Pettey, 1918 | |
| Bradysia flavipila Tuomikoski, 1960 | |
| Bradysia fochi Pettey, 1918 | |
| Bradysia forcipulata Lundbeck, 1898 | |
| Bradysia fulvicauda Felt, 1898 | |
| Bradysia fumida Johannsen, 1912 | |
| Bradysia giraudii Egger, 1862 | |
| Bradysia hartii Johannsen, 1912 | |
| Bradysia hastata Johannsen, 1912 | |
| Bradysia hilaris (Winnertz, 1867) | ⇒ Bradysia hilariformis Tuomikoski, 1960 |
| Bradysia impatiens Johannsen, 1912 | Dark-winged fungus gnat |
| Bradysia iridipennis Zetterstedt, 1838 | Fungus gnat |
| Bradysia johannseni Enderlein, 1912 | Recurved sphagnum |
| Bradysia jucunda Johannsen, 1912 | |
| Bradysia kaiseri Shaw, 1941 | |
| Bradysia macfarlanei Jones, 1920 | |
| Bradysia macroptera Pettey, 1918 | |
| Bradysia meigeni Rübsaamen, 1894 | |
| Bradysia mellea Johannsen, 1912 | |
| Bradysia mesochra Shaw, 1941 | |
| Bradysia molokaiensis Grimshaw, 1901 | |
| Bradysia munda Johannsen, 1912 | |
| Bradysia mutua Johannsen, 1912 | |
| Bradysia nitidicollis (Meigen, 1818) | ⇒ Bradysia aprica Winnertz, 1867 |
| Bradysia ocellaris Comstock, 1882 | Dark-winged fungus gnat |
| Bradysia ovata Pettey, 1918 | |
| Bradysia paracantha Yang, Zhang ..., 1995 | |
| Bradysia paradichaeta Shaw, 1941 | |
| Bradysia parilis Johannsen, 1912 | |
| Bradysia penna Pettey, 1918 | |
| Bradysia picea Rübsaamen, 1894 | |
| Bradysia pilata Pettey, 1918 | |
| Bradysia placida Winnertz, 1867 | |
| Bradysia pollicis Pettey, 1918 | |
| Bradysia prolifica Felt, 1898 | |
| Bradysia quadrispinosa Pettey, 1918 | |
| Bradysia radicum Brunetti, 1912 | Dark-winged fungus gnat |
| Bradysia reynoldsi Metz, 1938 | |
| Bradysia scabricornis Tuomikoski, 1960 | |
| Bradysia setigera Hardy, 1960 | |
| Bradysia sexdentata Pettey, 1918 | |
| Bradysia silvestrii Kieffer, 1910 | |
| Bradysia spatitergum Hardy, 1956 | |
| Bradysia spinata Pettey, 1918 | |
| Bradysia splendida Mohrig & Kri..., 1989 | |
| Bradysia strenua Winnertz, 1867 | |
| 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 trivittata Staeger, 1840 | |
| Bradysia unguicauda Malloch, 1923 | |
| Bradysia urticae Mohrig & Menzel, 1992 | |
| Bradysia varians Johannsen, 1912 | |
| Bradysia vernalis Zetterstedt, 1851 | |
| Brevicornu (Brevicornu) auriculatum Edwards, 1925 | |
| Brevicornu (Brevicornu) kingi Edwards, 1925 | |
| Brevicornu affinis Zaitzev, 1988 | California prickly phlox |
| Brevicornu arcticum Lundstrom, 1913 | |
| Brevicornu beatum Johannsen, 1912 | |
| Brevicornu bellum Johannsen, 1912 | |
| Brevicornu bipartitum Lastovka & M..., 1974 | Leadwort |
| Brevicornu californiense Zaitzev, 1985 | California prickly phlox |
| Brevicornu cristatum Zaitzev, 1985 | California prickly phlox |
| Brevicornu cuspidatum Zaitzev, 1992 | |
| Brevicornu disjunctum Zaitzev, 1988 | California prickly phlox |
| Brevicornu griseicolle Stæger, 1840 | |
| Brevicornu improvisum Zaitzev, 1992 | |
| Brevicornu melanderi Zaitzev, 1988 | California prickly phlox |
| Brevicornu nigrofuscum Lundstrom, 1909 | |
| Brevicornu occidentale Zaitzev, 1988 | California prickly phlox |
| Brevicornu pedatum Zatizev, 1988 | California prickly phlox |
| Brevicornu quadriseta Tonnoir & Ed..., 1927 | |
| Brevicornu sericoma Meigen, 1830 | |
| Brevicornu setulosum Zaitzev, 1988 | California prickly phlox |
| Brevicornu subarcticum Zaitzev, 1992 | |
| Brevicornu subfissicauda Zaitzev, 1985 | California prickly phlox |
| Chaetosciara joffrei Pettey, 1918 | |
| Cordyla gracilis Fisher, 1938 | |
| Cordyla neglecta Johannsen, 1912 | |
| Cordyla parvipalpis Edwards, 1925 | |
| Cordyla recens Johannsen, 1912 | |
| Cordyla volucris Johannsen, 1909 | Panal |
| Corynoptera bicuspidata Lengersdorf, 1926 | |
| Corynoptera blanda Winnertz, 1867 | |
| Corynoptera brevipalpis Steffan, 1969 | Dark-winged fungus gnat |
| Corynoptera cuniculata Lengersdorf, 1942 | |
| Corynoptera deserta (Heller & Menzel, 2006) | ⇒ Corynoptera inundata Fritz, 1982 |
| Corynoptera faculta Rudzinski, 2006 | |
| Corynoptera fratercula Vilkamaa & H..., 2006 | |
| Corynoptera harrisi Edwards, 1927 | |
| Corynoptera latistylata Hardy, 1956 | Dark-winged fungus gnat |
| Corynoptera lugens Johannsen, 1912 | |
| Corynoptera luravi Johannsen, 1929 | |
| Corynoptera melanochaeta Mohrig & Menzel, 1992 | |
| Corynoptera ovatula Menzel & Mohrig, 2000 | |
| Corynoptera penna Pettey, 1918 | |
| Corynoptera perfecta Pettey, 1918 | |
| Corynoptera perpusilla Winnertz, 1867 | |
| Corynoptera plusiochaeta Hippa, Vilka..., 2010 | |
| Corynoptera polana Rudzinski, 2009 | |
| Corynoptera subtrivialis Pettey, 1918 | |
| Corynoptera tapleyi Edwards, 1927 | |
| Corynoptera trepida Winnertz, 1867 | |
| Cosmosciara hartii Johannsen, 1912 | Dark-winged fungus gnat |
| Cratyna (Cratyna) cryptospina Rudzinski, 1993 | |
| Cratyna (Spathobdella) perplexa Winnertz, 1867 | |
| Cratyna arenicola Steffan, 1984 | |
| Cratyna johnstoni Shaw, 1935 | |
| Cratyna uliginosoides Heller, Köh..., 2016 | |
| Cratyna vagabunda Winnertz, 1867 | |
| Ctenosciara constrictans Edwards, 1927 | |
| Ctenosciara hawaiiensis Hardy, 1956 | |
| Ctenosciara hyalipennis Meigen, 1804 | |
| Ctenosciara ovalis Edwards, 1927 | |
| Ctenosciara xanthonota Edwards, 1927 | |
| Dynatosoma aureum Guthrie, 1917 | |
| Dynatosoma bifasciatum Walker, 1848 | |
| Dynatosoma coquilletti Landrock, 1918 | Little deserttrumpet |
| Dynatosoma fulvidum Coquillett, 1895 | |
| Dynatosoma fuscicorne Meigen, 1818 | Fungus gnat |
| Dynatosoma obscurum Zaitzev, 1988 | |
| Dynatosoma occidentale Zaitzev, 1988 | |
| Dynatosoma placidum Johannsen, 1912 | |
| Dynatosoma reciprocum Walker, 1848 | |
| Dynatosoma rotundatum Zaitzev, 1988 | |
| Dynatosoma thoracica (Coquillett, 1901) | ⇒ Dynatosoma coquilletti Landrock, 1918 |
| Dynatosoma thoracicum Zetterstedt, 1838 | |
| Epicypta aterrima Zetterstedt, 1852 | |
| Epicypta chaetophora Matile, 1979 | |
| Epicypta helvopicta Chandler, 1981 | |
| Epicypta lepida Chandler, 1981 | |
| Epicypta punctum Stannius, 1831 | |
| Epicypta scatophora (Perris, 1849) | ⇒ Epicypta limnophila Chandler, 1981 |
| Epidapus johannseni Shaw, 1953 | |
| Epidapus pallidus Seguy, 1961 | Black fungus gnat |
| 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 analis (Coquillett, 1901) | ⇒ Exechia adamsi Laffoon, 1965 |
| Exechia angustata Van Duzee, 1928 | Parish's yampah |
| Exechia attrita Johannsen, 1912 | |
| Exechia auxiliaria Johannsen, 1912 | |
| Exechia aviculata Shaw, 1935 | Redclay suncup |
| Exechia bella Johannsen, 1912 | |
| 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 canalicula Johannsen, 1912 | |
| 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 festiva Winnertz, 1863 | |
| Exechia filata Tonnoir & Ed..., 1927 | |
| Exechia frigida Boheman, 1865 | |
| Exechia fusca Meigen, 1804 | |
| Exechia juliaetta ♰ S. E. Lewis, 1969 | |
| Exechia ligulata (Shaw, 1951) | ⇒ Exechiopsis ligulata Lundstrom, 1913 |
| Exechia nativa Johannsen, 1912 | |
| Exechia nexa Johannsen, 1912 | |
| Exechia nigroscutellata Landrock, 1912 | |
| Exechia noctivaga Van Duzee, 1928 | Parish's yampah |
| Exechia nugatoria Johannsen, 1912 | |
| Exechia obediens Johannsen, 1912 | |
| Exechia palmata Johannsen, 1912 | |
| Exechia papyracea Stackelberg, 1948 | |
| Exechia parva (Lundstrom, 1909) | ⇒ Exechia capillata Johannsen, 1912 |
| Exechia pollex Shaw, 1935 | Redclay suncup |
| Exechia pratti Shaw, 1951 | Narrowleaf suncup |
| Exechia priscula ♰ A. L. Melander, 1949 | |
| Exechia pullata Ostroverkhova, 1979 | |
| Exechia quadrata Johannsen, 1912 | |
| Exechia satiata Johannsen, 1912 | |
| Exechia separata Lundstrom, 1912 | |
| Exechia shawi Fisher, 1934 | |
| Exechia spinuligera Lundstrom, 1912 | |
| Exechia subligulata Shaw, 1952 | Robust suncup |
| Exechia umbratica Aldrich, 1897 | |
| Exechia umbrosa Van Duzee, 1928 | Parish's yampah |
| Exechia unicincta Van Duzee, 1928 | Parish's yampah |
| Exechia unicolor Van Duzee, 1928 | Parish's yampah |
| Exechia unimaculata Zetterstedt, 1860 | |
| Exechiopsis (Exechiopsis) aemula Plassmann, 1984 | |
| Exechiopsis (Exechiopsis) clypeata Lundstrom, 1911 | |
| Exechiopsis (Exechiopsis) indecisa Walker, 1856 | |
| Exechiopsis (Exechiopsis) januarii Lundstrom, 1913 | |
| Exechiopsis (Exechiopsis) lackschewitziana Stackelberg, 1948 | |
| Exechiopsis (Exechiopsis) ligulata Lundstrom, 1913 | |
| Exechiopsis (Exechiopsis) pseudopulchella Lundstrom, 1912 | |
| Exechiopsis (Exechiopsis) pulchella Winnertz, 1863 | |
| Exechiopsis (Exechiopsis) sagittata Lastovka & M..., 1974 | |
| Exechiopsis (Exechiopsis) subulata Winnertz, 1863 | |
| Exechiopsis (Xenexechia) leptura Meigen, 1830 | |
| Exechiopsis nugax Johannsen, 1912 | |
| Exechiopsis sichuanensis Wu & Zheng, 2001 | |
| Hyperlasion wasmanni (Schmitz, 1918) | ⇒ Cratyna wasmanni Schmitz, 1919 |
| Keilbachia americana Kauschke, 2017 | |
| Keilbachia neglecta Johannsen, 1912 | |
| Keilbachia semiacuta Kauschke, 2017 | |
| Lycoriella (Hemineurina) flavipeda Mohrig & Kri..., 1987 | |
| Lycoriella (Hemineurina) modesta Staeger, 1840 | Fly |
| Lycoriella (Hemineurina) riparia 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) parva Holmgren, 1869 | |
| Lycoriella (Lycoriella) sativae Johannsen, 1912 | |
| Lycoriella (Lycoriella) solispina Hardy, 1956 | Dark-winged fungus gnat |
| Lycoriella brevipetiolata Shaw, 1941 | |
| Lycoriella farri Shaw, 1953 | |
| Lycoriella jauva Rapp, 1941 | |
| Lycoriella multiseta Felt, 1898 | Mushroom sciarid |
| Lycoriella pentamera Yang, Zhang ..., 1995 | |
| Lycoriella radicum Brunetti, 0 | Dark-winged fungus gnat |
| Lycoriella similans Johannsen, 1925 | |
| Lycoriella trifolii Pettey, 1918 | |
| Macrobrachius producta Johannsen, 1912 | |
| Mycetophila (Abmyceta) recta Johannsen, 1912 | |
| Mycetophila abiecta Lastovka, 1963 | |
| 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 autumnalis Lundstrom, 1909 | |
| Mycetophila bentincki Laffoon, 1957 | |
| Mycetophila bipunctata Loew, 1869 | Juniper globemallow |
| Mycetophila bohartorum Laffoon, 1947 | |
| Mycetophila bradenae ♰ T. D. A. Coc..., 1915 | |
| 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 crassicornis (Roser, 1840) | ⇒ Brevicornu crassicorne Stannius, 1831 |
| Mycetophila crassiseta Laffoon, 1957 | |
| Mycetophila crassitarsis Tonnoir & Ed..., 1927 | |
| Mycetophila cruciator Laffoon, 1957 | |
| Mycetophila curviseta Lundstrom, 1911 | |
| Mycetophila denningi (Shaw, 1951) | ⇒ Mycetophila clavata Van Duzee, 1928 |
| Mycetophila dentata Lundström, 1913 | |
| Mycetophila devia (Laffoon, 1957) | ⇒ Mycetophila curviseta Lundstrom, 1911 |
| Mycetophila discors Laffoon, 1957 | |
| Mycetophila dziedzickii Chandler, 1977 | |
| 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 fenestrata (Coquillett, 1904) | ⇒ Mycetophila ocellus Walker, 1848 |
| Mycetophila finlandica Edwards, 1913 | Elegant asterella |
| Mycetophila fisherae Laffoon, 1957 | |
| Mycetophila foecunda Johannsen, 1912 | |
| Mycetophila forcipata Lundstrom, 1913 | |
| Mycetophila frustrator Laffoon, 1957 | |
| Mycetophila fungorum De Geer, 1776 | |
| Mycetophila ghanii Shaw, 1951 | Narrowleaf suncup |
| Mycetophila grisescens Tonnoir & Ed..., 1927 | |
| Mycetophila hansoni | |
| Mycetophila harrisi Tonnoir & Ed..., 1927 | |
| Mycetophila hiulca Laffoon, 1957 | |
| Mycetophila hopkinsii (Coquillett, 1895) | ⇒ Boletina hopkinsii Coquillett, 1895 |
| Mycetophila hutsoni Duret, 1981 | |
| Mycetophila ichneumonea Say, 1823 | |
| Mycetophila illudens Laffoon, 1957 | |
| Mycetophila impellans Johannsen, 1912 | |
| Mycetophila intermedia Tonnoir & Ed..., 1927 | |
| Mycetophila itascae Laffoon, 1957 | |
| Mycetophila jucunda Johannsen, 1912 | |
| Mycetophila jugata Johannsen, 1912 | |
| Mycetophila kiamichii | |
| Mycetophila laeta Walker, 1848 | Ashy milkweed |
| Mycetophila latifascia Tonnoir & Ed..., 1927 | |
| Mycetophila lenis Johannsen, 1912 | |
| Mycetophila lenta Johannsen, 1912 | |
| Mycetophila limata Laffoon, 1957 | |
| Mycetophila luctuosa Meigen, 1830 | Stalkless yellowcress |
| Mycetophila marginepunctata rotundipennis Tonnoir, 1927 | |
| Mycetophila marginepunctata ruapehuensis Tonnoir & Ed..., 1927 | |
| Mycetophila merdigera Knab & Zwalu..., 1918 | |
| Mycetophila moravica Landrock, 1925 | Contra Costa buckwheat |
| Mycetophila napaea Laffoon, 1957 | |
| Mycetophila neofungorum Chandler, 1993 | |
| Mycetophila nigripalpis Tonnoir & Ed..., 1927 | |
| Mycetophila nitidula Tonnoir & Ed..., 1927 | |
| Mycetophila nubila (Say, 1829) | ⇒ Manota nubila Say, 1929 |
| Mycetophila occultata ♰ Scudder, 1877 | |
| Mycetophila ocellus 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 perpallida Chandler, 1993 | |
| Mycetophila persica (Riley, 1867) | ⇒ Mycetobia divergens Walker, 1856 |
| Mycetophila phyllura Tonnoir & Ed..., 1927 | |
| Mycetophila pictula Meigen, 1830 | Stalkless yellowcress |
| Mycetophila pinguis Loew, 1869 | Juniper globemallow |
| Mycetophila pollicata Edwards, 1927 | |
| Mycetophila procera Loew, 1869 | Juniper globemallow |
| Mycetophila recula Laffoon, 1957 | |
| Mycetophila rijsaria | |
| 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 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 strigatoides Landrock, 1927 | |
| Mycetophila subita Laffoon, 1957 | |
| Mycetophila subquatuornotata (Shaw, 1940) | ⇒ Mycetophila trinotata Staeger, 1840 |
| Mycetophila tapleyi Tonnoir & Ed..., 1927 | |
| Mycetophila tenebrosa Tonnoir & Ed..., 1927 | |
| Mycetophila thioptera Shaw, 1940 | Lewis River suncup |
| Mycetophila trifasciata (Coquillett, 1904) | ⇒ Mycetophila paula Loew, 1869 |
| Mycetophila trinotata Staeger, 1840 | Blue weed |
| Mycetophila uliginosa Chandler, 1988 | |
| Mycetophila uncinata Laffoon, 1957 | |
| Mycetophila uninotata Zetterstedt, 1852 | |
| Mycetophila unipunctata Meigen, 1818 | |
| Mycetophila vegeta Laffoon, 1957 | |
| Mycetophila venusta Laffoon, 1957 | |
| Mycetophila verecunda Laffoon, 1957 | |
| Mycetophila vesca Laffoon, 1957 | |
| Mycetophila viridis Tonnoir & Ed..., 1927 | |
| Mycetophila vulgaris Tonnoir & Ed..., 1927 | |
| Mycetophila wirthi Laffoon, 1957 | |
| Odontosciara nigra Rubsaamen, 1894 | |
| 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 cornuta Lundström, 1914 | |
| Phronia cupida Gagne, 1975 | |
| 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 flavipes Winnertz, 1863 | Spreading phlox |
| Phronia forcipula Winnertz, 1863 | Spreading phlox |
| Phronia fusciventris Van Duzee, 1928 | Parish's yampah |
| Phronia gagnei Chandler, 1992 | |
| Phronia hilaris Gagne, 1975 | |
| Phronia incerta Adams, 1907 | |
| 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 portschinskyi Dziedzicki, 1889 | |
| Phronia siebeckii Dziedzicki, 1889 | |
| Phronia similis Johannsen, 1912 | |
| Phronia taczanowskyi (Dziedzicki, 1889) | ⇒ Phronia obtusa Winnertz, 1863 |
| Phronia tenebrosa Coquillett, 1904 | |
| Phronia tenuis Winnertz, 1863 | Spreading phlox |
| Phronia tiefii Dziedzicki, 1889 | |
| Phronia versuta Gagne, 1975 | |
| Phronia willistoni Dziedzicki, 1889 | |
| Phytosciara (Dolichosciara) flavipes Meigen, 1804 | Fungus Gnat |
| Phytosciara (Phytosciara) halterata Lengersdorf, 1926 | |
| Phytosciara (Phytosciara) macrotricha Lengersdorf, 1926 | |
| Phytosciara (Phytosciara) vulcanata Steffan, 1973 | |
| Phytosciara (Prosciara) prosciaroides Tuomikoski, 1960 | |
| Phytosciara tetrix Hippa, 1991 | |
| Phytosciara wuyiana Yang, 2003 | |
| Platurocypta immaculata Tonnoir, 1927 | |
| Pnyxia scabiei Hopkins, 1895 | Potato scab gnat |
| Pseudexechia ovata Fisher, 1934 | |
| Pseudexechia trisignata Edwards, 1913 | |
| Pseudobrachypeza bulbosa Johannsen, 1912 | |
| Pseudobrachypeza helvetica Walker, 1856 | |
| Pseudolycoriella basisetosa Mohrig & Kau..., 2019 | |
| Pseudolycoriella brevialata Mohrig & Kau..., 2019 | |
| Pseudolycoriella brunnea Bukowski & L..., 1936 | |
| Pseudolycoriella chlorothoracica Mohrig & Kau..., 2019 | |
| Pseudolycoriella jejuna Edwards, 1927 | |
| Pseudolycoriella longisetosa Mohrig & Kau..., 2019 | |
| Pseudolycoriella pollicis Pettey, 1918 | |
| Pseudolycoriella subjucunda Mohrig & Kau..., 2019 | |
| Pseudolycoriella trivialis Johannsen, 1912 | |
| Pseudolycoriella zealandica Edwards, 1927 | |
| Pseudorymosia fovea Dziedzicki, 1910 | |
| Rymosia beckeri Shaw, 1951 | Narrowleaf suncup |
| Rymosia coheri Shaw, 1951 | Narrowleaf suncup |
| Rymosia dietrichi Shaw, 1951 | Narrowleaf suncup |
| Rymosia diffissa Johannsen, 1912 | |
| Rymosia domestica Meigen, 1830 | |
| Rymosia filipes Loew, 1869 | Juniper globemallow |
| Rymosia imitator Johannsen, 1912 | |
| Rymosia inflata Johannsen, 1912 | |
| Rymosia lacki Edwards, 1935 | |
| Rymosia marionae (Shaw, 1951) | ⇒ Rymosia beckeri Shaw, 1951 |
| Rymosia miocenica Lewis, 1969 | |
| Rymosia parvicauda Van Duzee, 1928 | Parish's yampah |
| Rymosia pediformis Shaw, 1951 | Narrowleaf suncup |
| Rymosia pinnata Ostroverkhova, 1979 | |
| Rymosia plumosa Van Duzee, 1928 | Parish's yampah |
| Rymosia sericea Say, 1824 | |
| Rymosia serripes Johannsen, 1912 | |
| Rymosia spinicauda Van Duzee, 1928 | Parish's yampah |
| Rymosia strangulata ♰ Scudder, 1890 | |
| Rymosia triangularis Shaw, 1935 | Redclay suncup |
| Scatopsciara (Scatopsciara) curviforceps Bukowski & L..., 1936 | |
| Scatopsciara (Scatopsciara) nacta Johannsen, 1912 | |
| Scatopsciara (Scatopsciara) nana Winnertz, 1871 | |
| Scatopsciara (Scatopsciara) neglecta Menzel & Mohrig, 1998 | |
| Scatopsciara (Xenopygina) paradoxa Frey, 1948 | |
| Scatopsciara (Xenopygina) radialis Shaw, 1934 | |
| Scatopsciara (Xenopygina) ventrospinula Mohrig & Mamaev, 1983 | |
| Scatopsciara actuosa Johannsen, 1912 | |
| Scatopsciara acuta Johannsen, 1912 | |
| Scatopsciara awanatae Mohrig & Kau..., 2016 | |
| Scatopsciara awinitae Mohrig & Kau..., 2016 | |
| Scatopsciara catoriae Mohrig & Kau..., 2016 | |
| Scatopsciara chenoae Mohrig & Kau..., 2016 | |
| Scatopsciara dendrotica Steffan, 1968 | |
| Scatopsciara fratercula Vilkamaa & H..., 2006 | |
| Scatopsciara inesae Mohrig & Kau..., 2016 | |
| Scatopsciara itumae Mohrig & Kau..., 2016 | |
| Scatopsciara miakodae | |
| Scatopsciara praealawae Mohrig & Kau..., 2016 | |
| Scatopsciara praeawanatae Mohrig & Kau..., 2016 | |
| Scatopsciara subawanatae Mohrig & Kau..., 2016 | |
| Scatopsciara subgrossa Mohrig & Kau..., 2016 | |
| Scatopsciara subitumae Mohrig & Kau..., 2016 | |
| Scatopsciara submiakodae | |
| Scatopsciara tricuspidatula Mohrig & Kau..., 2016 | |
| Sceptonia fumipes Edwards, 1925 | |
| Sceptonia longisetosa Ševčík, 2004 | |
| Sceptonia membranacea Edwards, 1925 | |
| Sciara abbreviata Walker, 1848 | |
| Sciara arcuata Garrett, 1925 | |
| Sciara atomaria (Lynch Arribá..., 1892) | ⇒ Scatopsciara atomaria Zetterstedt, 1851 |
| Sciara atrata (Say, 1824) | ⇒ Bradysia meigeni Rübsaamen, 1894 |
| Sciara borealis Rübsaamen, 1898 | |
| Sciara brevipetiolata (Enderlein, 1911) | ⇒ Lycoriella brevipetiolata Shaw, 1941 |
| Sciara congregata Johannsen, 1914 | Aptenia |
| Sciara cylindrica Pettey, 1918 | Vermont blackberry |
| Sciara dichaeta (Shaw, 1941) | ⇒ Bradysia dichaeta Shaw, 1941 |
| Sciara dimidiata Say, 1832 | |
| Sciara dives Johannsen, 1912 | |
| Sciara dormitans ♰ A. L. Melander, 1949 | |
| Sciara exigua Say, 1824 | |
| Sciara exilis ♰ Say, 1829 | |
| Sciara expolita (Coquillett, 1900) | ⇒ Bradysia expolita Coquillett, 1900 |
| Sciara femorata Say, 1823 | |
| Sciara florissantensis ♰ T. D. A. Coc..., 1916 | |
| Sciara fraterna Say, 1824 | |
| Sciara fuliginosus Fitch, 1856 | |
| Sciara futilis Johannsen, 1912 | |
| Sciara garretti Shaw, 1952 | |
| Sciara globosa Pettey, 1918 | Vermont blackberry |
| Sciara habilis Johannsen, 1912 | |
| Sciara hardyi (Shaw, 1952) | ⇒ Bradysia impatiens Johannsen, 1912 |
| Sciara hebes Loew, 1870 | |
| Sciara humeralis Zetterstedt, 1851 | |
| Sciara inconstans Fitch, 1856 | Fickle midge |
| Sciara kitakamiensis Sutou, 2004 | |
| Sciara luravi (Johannsen, 1929) | ⇒ Corynoptera luravi Johannsen, 1929 |
| Sciara lurayi | |
| Sciara lurida Walker, 1848 | |
| Sciara militaris Nowicki, 1868 | |
| Sciara multiseta (Felt, 1898) | ⇒ Lycoriella multiseta Felt, 1898 |
| Sciara ochrolabis Loew, 1869 | Juniper globemallow |
| Sciara paradichaeta (Shaw, 1941) | ⇒ Bradysia paradichaeta Shaw, 1941 |
| Sciara pauciseta (Felt, 1898) | ⇒ Lycoriella ingenua Dufour, 1839 |
| Sciara polita Say, 1824 | |
| Sciara psittacus Pettey, 1918 | Vermont blackberry |
| Sciara requieta ♰ A. L. Melander, 1949 | |
| Sciara rotundipennis Macquart, 1838 | |
| Sciara sciophila Loew, 1869 | Juniper globemallow |
| Sciara scita Johannsen, 1912 | |
| Sciara scopuli ♰ S. H. Scudder, 1890 | |
| Sciara sedula Skuse, 1888 | |
| Sciara sepulta ♰ S. E. Lewis, 1969 | |
| Sciara sopora ♰ A. L. Melander, 1949 | |
| Sciara tanypeza Meunier, 1899 | |
| Sciara townesi Shaw, 1935 | Redclay suncup |
| Sciara unguicauda (Malloch, 1923) | ⇒ Bradysia unguicauda Malloch, 1923 |
| Sciara vicina Johannsen, 1912 | |
| Sciara vulgaris Fitch, 1856 | |
| Synplasta gracilis Winnertz, 1863 | |
| Tarnania fenestralis Meigen, 1838 | |
| Tarnania tarnanii Dziedzicki, 1910 | |
| Trichonta atricauda Zetterstedt, 1852 | |
| Trichonta beata Gagne, 1981 | |
| Trichonta bellula (Johannsen, 1912) | ⇒ Trichonta vulgaris Loew, 1869 |
| 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 falcata Lundström, 1911 | |
| Trichonta festa Gagne, 1981 | |
| Trichonta fissicauda (Zetterstedt, 1852) | ⇒ Trichonta atricauda Zetterstedt, 1852 |
| 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 sagana (Shaw, 1940) | ⇒ Trichonta hamata Mik, 1880 |
| Trichonta salva Gagne, 1981 | |
| Trichonta sedula Gagne, 1981 | |
| Trichonta subfusca Lundström, 1909 | |
| Trichonta submaculata Stæger, 1840 | |
| Trichonta subterminalis Zaitzev & Me..., 1996 | |
| Trichonta terminalis Walker, 1856 | |
| Trichonta venosa Staeger, 1840 | |
| Trichonta vitta Meigen, 1830 | |
| Trichonta vulgaris Loew, 1869 | Juniper globemallow |
| Trichosia (Baeosciara) scotica Edwards, 1925 | |
| Trichosia cylindrica Pettey, 1918 | |
| Trichosia diota Garrett, 1925 | |
| Trichosia townesi Shaw, 1935 | |
| Xylosciara (Protoxylosciara) brevipes Steffan, 1964 | |
| Xylosciara (Xylosciara) merodon Hippa & Vilk..., 2004 | |
| Xylosciara (Xylosciara) mohrigi Hippa & Vilk..., 2004 | |
| Xylosciara (Xylosciara) trigemina Hippa & Vilk..., 2004 | |
| Zygomyia brunnea Tonnoir, 1927 | |
| Zygomyia filigera Edwards, 1927 | |
| Zygomyia ignobilis Loew, 1869 | Juniper globemallow |
| Zygomyia interrupta Malloch, 1914 | Gray's bur cucumber |
| Zygomyia notata Stannius, 1831 | |
| Zygomyia ornata Loew, 1869 | Juniper globemallow |
| Zygomyia pictipennis Staeger, 1840 | |
| Zygomyia vara Staeger, 1840 | |
| Zygoneura (Zygoneura) sciarina Meigen, 1830 | |
| Zygoneura calthella Eiseman, Hel..., 2016 | |
| Zygoneura contractans Edwards, 1927 | |
| Zygoneura flavicoxa Johannsen, 1912 | |
| Zygoneura johannseni Shaw, 1941 | Wingfruit suncup |
| Zygoneura zygoneura Williston, 1896 | |
