| Cnephia dacotensis Dyar & Shannon, 1927 | Dakota Black Fly |
| Cnephia eremites Shewell, 1952 | Broadleaf enchanter's nightshade |
| Cnephia ornithophilia Davies, Pete..., 1962 | |
| Cnephia pecuarum Riley, 1887 | Southern buffalo gnat |
| Ectemnia invenusta Walker, 1848 | Unattractive Black Fly |
| Ectemnia taeniatifrons Enderlein, 1925 | Banded Black Fly |
| Greniera abdita Peterson, 1962 | |
| Greniera abditoides Wood, 1963 | |
| Greniera denaria Davies, Pete..., 1962 | Number Ten Black Fly |
| Gymnopais dichopticoides Wood, 1978 | Virgin Black Fly |
| Gymnopais dichopticus Stone, 1949 | Wright's mock buckthorn |
| Gymnopais fimbriatus Wood, 1978 | |
| Gymnopais holopticoides Wood, 1978 | |
| Gymnopais holopticus Stone, 1949 | Wright's mock buckthorn |
| Helodon alpestris Dorogostaisk..., 1935 | |
| Helodon clavatus Peterson, 1970 | Clubbed Black Fly |
| Helodon onychodactylus Dyar & Shannon, 1927 | Clawed Black Fly |
| Helodon perspicuus Sommerman, 1958 | |
| Helodon pleuralis Malloch, 1914 | Hairy Sided Black Fly |
| Helodon susanae Peterson, 1970 | Susan´s Black Fly |
| Helodon vernalis Shewell, 1952 | |
| Mayacnephia osborni Stains & Kno..., 1943 | |
| Mayacnephia stewarti Coleman, 1953 | |
| Metacnephia borealis Malloch, 1919 | |
| Metacnephia freytagi DeFoliart & ..., 1960 | |
| Metacnephia jeanae DeFoliart & ..., 1960 | |
| Metacnephia pallipes Fries, 1824 | |
| Metacnephia saileri Stone, 1952 | Sailer´s Black Fly |
| Metacnephia saskatchewana Shewell & Fr..., 1958 | Saskatchewan Black Fly |
| Metacnephia sommermanae Stone, 1952 | |
| Metacnephia villosa DeFoliart & ..., 1960 | Shaggy Black Fly |
| Parasimulium (Parasimulium) crosskeyi Peterson, 1977 | Steele's dewberry |
| Parasimulium (Parasimulium) furcatum Malloch, 1914 | Gray's bur cucumber |
| Parasimulium (Parasimulium) stonei Peterson, 1977 | Steele's dewberry |
| Piezosimulium jeanninae Peterson, 1989 | |
| Prosimulium (Prosimulium) ursinum Edwards, 1935 | |
| Prosimulium albertense (Peterson & D..., 1972) | ⇒ Helodon clavatus Peterson, 1970 |
| Prosimulium alpestre (Dorogostaisk..., 1935) | ⇒ Helodon alpestris Dorogostaisk..., 1935 |
| Prosimulium approximatum Peterson, 1970 | Salmonberry |
| Prosimulium arvum Adler & Kim, 1985 | |
| Prosimulium caudatum Shewell, 1959 | Broadleaf enchanter's nightshade |
| Prosimulium clavatum (Peterson, 1970) | ⇒ Helodon clavatus Peterson, 1970 |
| Prosimulium constrictistylum Peterson, 1970 | Salmonberry |
| Prosimulium daviesi Peterson & D..., 1960 | Swamp blackberry |
| Prosimulium decemarticulatum Twinn, 1936 | |
| Prosimulium dicentum Dyar & Shannon, 1927 | |
| Prosimulium dicum Dyar & Shannon, 1927 | |
| Prosimulium doveri Sommerman, 1962 | Rafflesias |
| Prosimulium esselbaughi Sommerman, 1964 | Esselbaugh´s Black Fly |
| Prosimulium exigens Dyar & Shannon, 1927 | Demanding Black Fly |
| Prosimulium flaviantennum Stains & Kno..., 1940 | |
| Prosimulium fontanum Stone & Davies, 1958 | |
| Prosimulium formosum Shewell, 1959 | Broadleaf enchanter's nightshade |
| Prosimulium frohnei Sommerman, 1958 | Frohhe´s Black Fly |
| Prosimulium fulvithorax Shewell, 1959 | Broadleaf enchanter's nightshade |
| Prosimulium fulvum Coquillett, 1902 | Yellow Gnat |
| Prosimulium fuscum Syme & Davies, 1958 | |
| Prosimulium gibsoni Twinn, 1936 | |
| Prosimulium impostor Peterson, 1970 | Salmonberry |
| Prosimulium longilobum Peterson & D..., 1960 | Swamp blackberry |
| Prosimulium magnum Dyar & Shannon, 1927 | |
| Prosimulium martini Peterson, 1970 | Salmonberry |
| Prosimulium mixtum Syme & Davies, 1958 | |
| Prosimulium multidentatum Twinn, 1936 | |
| Prosimulium mysticum (Peterson, 1970) | ⇒ Prosimulium fuscum Syme & Davies, 1958 |
| Prosimulium neomacropyga Peterson, 1970 | Salmonberry |
| Prosimulium onychodactylum (Dyar & Shannon, 1927) | ⇒ Helodon onychodactylus Dyar & Shannon, 1927 |
| Prosimulium perspicuum (Sommerman, 1958) | ⇒ Helodon perspicuus Sommerman, 1958 |
| Prosimulium pleurale (Malloch, 1914) | ⇒ Helodon pleuralis Malloch, 1914 |
| Prosimulium rhizophorum Stone & Jamn..., 1955 | Dahurian buckthorn |
| Prosimulium saltus Stone & Jamn..., 1955 | Dahurian buckthorn |
| Prosimulium shewelli Peterson & D..., 1960 | Swamp blackberry |
| Prosimulium susanae (Peterson, 1970) | ⇒ Helodon susanae Peterson, 1970 |
| Prosimulium transbrachium Adler & Kim, 1985 | |
| Prosimulium travisi Stone, 1952 | Jujube |
| Prosimulium uinta Peterson & D..., 1960 | Swamp blackberry |
| Prosimulium unicum Twinn, 1938 | |
| Prosimulium vernale (Shewell, 1952) | ⇒ Helodon vernalis Shewell, 1952 |
| Prosimulium woodorum Peterson, 1970 | Salmonberry |
| Simulium (Boreosimulium) baffinense Twinn, 1936 | |
| Simulium (Boreosimulium) johannseni Hart, 1912 | Johannsen´s Black Fly |
| Simulium (Byssodon) meridionale Riley, 1887 | Beatley's clover |
| Simulium (Chirostilbia) laneportoi Vargas, 1941 | Meadowparsnip |
| Simulium (Ectemnaspis) bicoloratum Malloch, 1912 | |
| Simulium (Eusimulium) bracteatum (Coquillett, 1898) | ⇒ Simulium appalachiense Adler, Curri..., 2004 |
| Simulium (Eusimulium) congareenarum Dyar & Shannon, 1927 | |
| Simulium (Eusimulium) cryophilum Rubtsov, 1959 | |
| Simulium (Eusimulium) decolletum Adler & Currie, 1986 | |
| Simulium (Eusimulium) euryadminiculum Davies, 1949 | |
| Simulium (Eusimulium) fibrinflatum Twinn, 1936 | |
| Simulium (Eusimulium) latipes Meigen, 1804 | |
| Simulium (Eusimulium) pilosum (Knowlton & Rowe, 1934) | ⇒ Simulium appalachiense Adler, Curri..., 2004 |
| Simulium (Eusimulium) pugetense Dyar & Shannon, 1927 | |
| Simulium (Eusimulium) tuberosum Lundström, 1911 | |
| Simulium (Eusimulium) vernum Macquart, 1826 | |
| Simulium (Hellichiella) anatinum Wood, 1963 | Duck Black Fly |
| Simulium (Hellichiella) clarkei Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium (Hellichiella) duplex Shewell & Fr..., 1958 | Enchanter's nightshade |
| Simulium (Hellichiella) emarginatum Davies, Pete..., 1962 | |
| Simulium (Hellichiella) excisum Davies, Pete..., 1962 | |
| Simulium (Hellichiella) innocens Shewell, 1952 | |
| Simulium (Hellichiella) minus Dyar & Shannon, 1927 | |
| Simulium (Hellichiella) nebulosum Currie & Adler, 1986 | |
| Simulium (Hemicnetha) canadense Hearle, 1932 | Scarlet larkspur |
| Simulium (Hemicnetha) longistylatum Shewell, 1959 | Broadleaf enchanter's nightshade |
| Simulium (Hemicnetha) pictipes Hagen, 1880 | Coontie |
| Simulium (Hemicnetha) solarii Stone, 1948 | Smallflower mock buckthorn |
| Simulium (Hemicnetha) virgatum Coquillett, 1902 | |
| Simulium (Morops) longirostre Smart, 1972 | |
| Simulium (Nevermannia) aestivum Davies, Pete..., 1962 | |
| Simulium (Nevermannia) bicorne Dorogostaisk..., 1935 | |
| Simulium (Nevermannia) caledonense (Adler & Currie, 1986) | ⇒ Simulium silvestre Rubtsov, 1956 |
| Simulium (Nevermannia) craigi Adler & Currie, 1986 | Craig´s Black Fly |
| Simulium (Nevermannia) croxtoni Nicholson & ..., 1950 | Croxton´s Black Fly |
| Simulium (Nevermannia) cryophilum Rubtsov, 1959 | |
| Simulium (Nevermannia) furculatum Shewell, 1952 | Forked Black Fly |
| Simulium (Nevermannia) gouldingi Stone, 1952 | Jujube |
| Simulium (Nevermannia) impar Davies, Pete..., 1962 | |
| Simulium (Nevermannia) quebecense Twinn, 1936 | Whorled marshpennywort |
| Simulium (Nevermannia) silvestre Rubtsov, 1956 | Woodland Black Fly |
| Simulium (Nevermannia) wyomingense Stone & DeFo..., 1959 | |
| Simulium (Psilopelmia) bivittatum Malloch, 1914 | Gray's bur cucumber |
| Simulium (Psilopelmia) griseum Coquillett, 1898 | Gray Black Fly |
| Simulium (Psilopelmia) mediovittatum Knab, 1915 | Coastal seepweed |
| Simulium (Psilopelmia) notatum Adams, 1904 | |
| Simulium (Psilopelmia) trivittatum Malloch, 1914 | Gray's bur cucumber |
| Simulium (Psilopelmia) venator Dyar & Shannon, 1927 | |
| Simulium (Psilozia) argus Williston, 1893 | |
| Simulium (Psilozia) encisoi Vargas & Dia..., 1949 | Strickland's umbrellawort |
| Simulium (Psilozia) vittatum Zetterstedt, 1838 | Striped black fly |
| Simulium (Simulium) appalachiense Adler, Curri..., 2004 | |
| Simulium (Simulium) aranti Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium (Simulium) arcticum Malloch, 1914 | Arctic Black Fly |
| Simulium (Simulium) corbis (Twinn, 1936) | ⇒ Simulium murmanum Enderlein, 1935 |
| Simulium (Simulium) decorum Walker, 1848 | Ashy milkweed |
| Simulium (Simulium) defoliarti Stone & Pete..., 1958 | Alder buckthorn |
| Simulium (Simulium) fibrinflatum Twinn, 1936 | Whorled marshpennywort |
| Simulium (Simulium) hunteri Malloch, 1914 | Gray's bur cucumber |
| Simulium (Simulium) iriartei Vargas & al., 1946 | |
| Simulium (Simulium) jacumbae Dyar & Shannonn, 1927 | |
| Simulium (Simulium) jenningsi Malloch, 1914 | Gray's bur cucumber |
| Simulium (Simulium) krebsorum Moulton & Adler, 1992 | |
| Simulium (Simulium) lassmanni Vargas & al., 1946 | |
| Simulium (Simulium) luggeri Nicholson & ..., 1950 | Lugger´s Gnat |
| Simulium (Simulium) malyschevi Dorogostaisk..., 1935 | Malyschev´s Black Fly |
| Simulium (Simulium) murmanum Enderlein, 1935 | Murmansk Black Fly |
| Simulium (Simulium) nigricoxum Stone, 1952 | Red buckthorn |
| Simulium (Simulium) nyssa Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium (Simulium) parnassum Malloch, 1914 | Dark Black Fly |
| Simulium (Simulium) petersoni Stone & DeFo..., 1959 | |
| Simulium (Simulium) piperi Dyar & Shannon, 1927 | Piper´s Black Fly |
| Simulium (Simulium) rostratum (Lundström, 1911) | ⇒ Simulium longirostre Smart, 1972 |
| Simulium (Simulium) rubtzovi Smart, 1945 | Russet buffalo-berry |
| Simulium (Simulium) rugglesi Nicholson & ..., 1950 | Pacific stonecrop |
| Simulium (Simulium) slossonae Dyar & Shannon, 1927 | |
| Simulium (Simulium) taxodium Snoddy & Bes..., 1968 | Pacific mistletoe |
| Simulium (Simulium) tescorum Stone & Boreham, 1965 | Redberry buckthorn |
| Simulium (Simulium) transiens Rubzov, 1940 | Broad Legged Black Fly |
| Simulium (Simulium) truncata (Lundström, 1911) | ⇒ Simulium cryophilum Rubtsov, 1959 |
| Simulium (Simulium) tuberosum (Lundström, 1911) | ⇒ Simulium tuberosum Lundström, 1911 |
| Simulium (Simulium) venustum Say, 1823 | Maculate-legged black fly |
| Simulium (Simulium) verecundum Stone & Jamn..., 1955 | Dahurian buckthorn |
| Simulium canonicolum Dyar & Shannon, 1927 | Canyon Black Fly |
| Simulium claricentrum Adler, 1990 | |
| Simulium dixiense Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium fionae Adler, 1990 | |
| Simulium haysi Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium jonesi Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium lakei Snoddy, 1976 | |
| Simulium loerchae Adler, 1987 | |
| Simulium notiale Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium penobscotense Snoddy & Bauer, 1978 | |
| Simulium podostemi Snoddy, 1971 | |
| Simulium rivuli Twinn, 1936 | Whorled marshpennywort |
| Simulium snowi Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Simulium underhilli Stone & Snoddy, 1969 | Lanceleaf buckthorn |
| Stegopterna emergens Stone, 1952 | Emerging Black Fly |
| Stegopterna mutatum Malloch, 1914 | |
| Twinnia hirticornis Wood, 1978 | |
| Twinnia novum Dyar & Shannon, 1927 | |
| Twinnia tibblesi Stone & Jamn..., 1955 | Dahurian buckthorn |
