| Allocapnia aurora Ricker, 1952 | Aurora Snowfly |
| Allocapnia curiosa Frison, 1942 | Peculiar Snowfly |
| Allocapnia forbesi Frison, 1929 | Three-knobbed Snowfly |
| Allocapnia frisoni Ross & Ricker, 1964 | Evansville Snowfly |
| Allocapnia granulata Claassen, 1924 | Common Snowfly |
| Allocapnia illinoensis Frison, 1935 | Illinois Snowfly |
| Allocapnia indianae Ricker, 1952 | Indiana Snowfly |
| Allocapnia jeanae Ross, 1964 | Osage Snowfly |
| Allocapnia malverna Ross, 1964 | Gulf Snowfly |
| Allocapnia maria Hanson, 1942 | Two-knobbed Snowfly |
| Allocapnia menawa Grubbs & She..., 2008 | Menawa Snowfly |
| Allocapnia minima Barnston, 1848 | Boreal Snowfly |
| Allocapnia mohri Ross & Ricker, 1964 | Ouachita Snowfly |
| Allocapnia muskogee Grubbs & She..., 2008 | Muskogee Snowfly |
| Allocapnia mystica Frison, 1929 | Moraine Snowfly |
| Allocapnia nivicola Fitch, 1847 | Brook Snowfly |
| Allocapnia ohioensis Ross & Ricker, 1964 | Ohio Snowfly |
| Allocapnia pechumani Ross & Ricker, 1964 | St. Lawrence Snowfly |
| Allocapnia polemistis Ross & Ricker, 1971 | Black Warrior Snowfly |
| Allocapnia pygmaea Burmeister, 1839 | Pygmy Snowfly |
| Allocapnia recta Claassen, 1924 | Eastern Snowfly |
| Allocapnia rickeri Frison, 1929 | Midwest Snowfly |
| Allocapnia sano Grubbs, 2006 | Sano Snowfly |
| Allocapnia smithi Ross & Ricker, 1971 | Three-lobed Snowfly |
| Allocapnia starki Kondratieff ..., 2000 | Mississippi Snowfly |
| Allocapnia tennessa Ross & Ricker, 1964 | Tennessee Snowfly |
| Allocapnia tsalagi Grubbs, 2008 | Tsalagi Snowfly |
| Allocapnia virginiana Frison, 1942 | Virginiana Snowfly |
| Allocapnia vivipara Claassen, 1924 | Shortwing Snowfly |
| Allocapnia wrayi Ross, 1964 | Pristine Snowfly |
| Allocapnia zola Ricker, 1952 | Ash Snowfly |
| Aphanicercella cassida (Barnard, 1934) | ⇒ |
| Arsapnia pileata Jewett, 1966 | Birdhead Snowfly |
| Arsapnia tumida Claassen, 1924 | Swollen Snowfly |
| Austrocerca tasmanica Tillyard, 1924 | |
| Austrocercella tillyardi Kimmins, 1951 | |
| Austrocercoides bullata Kimmins, 1951 | |
| Baikaloperla elongata Zapekina-Dul..., 1973 | |
| Baikaloperla kozhovi Zapekina-Dul..., 1973 | |
| Bolshecapnia maculata Jewett, 1954 | Spotted Snowfly |
| Bolshecapnia milami Nebeker & Ga..., 1967 | Glacier Snowfly |
| Bolshecapnia missiona Baumann & Po..., 2007 | Mission Snowfly |
| Bolshecapnia spenceri Ricker, 1965 | Ice Snowfly |
| Capnia affinis Morton, 1896 | Huckleberry |
| Capnia ahngeri (Koponen, 1949) | ⇒ Capnia atra Morton, 1896 |
| Capnia aligera Zapekina-Dul..., 1975 | |
| Capnia alternata Zapekina-Dul..., 1975 | |
| Capnia ansobiensis Zhiltzova, 1974 | |
| Capnia arensi Zhiltzova, 1964 | |
| Capnia atra Morton, 1896 | Huckleberry |
| Capnia badakhshanica Zhiltzova, 1974 | |
| Capnia bargusinica Zapekina-Dul..., 1975 | |
| Capnia bicornata Alouf, 1992 | |
| Capnia bicuspidata Zhiltzova, 1974 | |
| Capnia bifrons (Newman, 1838) | ⇒ Zwicknia bifrons Newman, 1838 |
| Capnia bimaculata Zhiltzova, 1969 | |
| Capnia bituberculata Ueno, 1929 | |
| Capnia cheama Ricker, 1965 | Cheama Snowfly |
| Capnia coloradensis Claassen, 1937 | Colorado Snowfly |
| Capnia confusa Claassen, 1936 | Widespread Snowfly |
| Capnia conica (Klapálek, 1909) | ⇒ Capnia nigra Pictet, 1833 |
| Capnia elongata Claassen, 1924 | Cascades Snowfly |
| Capnia erecta Jewett, 1955 | Erect Snowfly |
| Capnia excavata Claassen, 1924 | Saddleback Snowfly |
| Capnia glabra Claassen, 1924 | Smooth Snowfly |
| Capnia gracilaria Claassen, 1924 | Slender Snowfly |
| Capnia hamifera Zhiltzova, 1969 | |
| Capnia iturupiensis Zhiltzova, 1980 | |
| Capnia jankowskajae Zhiltzova, 1974 | |
| Capnia jewetti Frison, 1942 | Spring Snowfly |
| Capnia kersti Nelson, 2004 | Eugene Snowfly |
| Capnia khubsugulica Zhiltzova & ..., 1987 | |
| Capnia kibuneana Kawai, 1957 | |
| Capnia kolymensis Zhiltzova, 1981 | |
| Capnia kurnakovi Zhiltzova, 1978 | |
| Capnia lepnevae Zapekina-Dul..., 1957 | |
| Capnia levanidovae Kawai, 1969 | |
| Capnia licina Jewett, 1954 | Bent Snowfly |
| Capnia longicauda Zhiltzova, 1969 | |
| Capnia melia Frison, 1942 | Northwest Snowfly |
| Capnia nana Claassen, 1924 | Dwarf Snowfly |
| Capnia nana nana Claassen, 1924 | |
| Capnia nana wasatchae Nebeker & Ga..., 1967 | |
| Capnia nigra (Pictet, 1833) | ⇒ Isocapnia sibirica Zapekina-Dul..., 1955 |
| Capnia oregona Frison, 1942 | Oregon Snowfly |
| Capnia petila Jewett, 1954 | Thin Snowfly |
| Capnia potikhae Zhiltzova, 1996 | |
| Capnia prolongata Zhiltzova, 1969 | |
| Capnia promota Frison, 1937 | Pacific Snowfly |
| Capnia pygmaea (Zetterstedt, 1840) | ⇒ Allocapnia pygmaea Burmeister, 1839 |
| Capnia rara Zapekina-Dul..., 1970 | |
| Capnia sevanica (Zhiltzova, 1964) | ⇒ Zwicknia sevanica Zhiltzova, 1964 |
| Capnia sextuberculata Jewett, 1954 | Six-knobbed Snowfly |
| Capnia shugnanica Zhiltzova, 1974 | |
| Capnia sidimiensis Zhiltzova, 1979 | |
| Capnia singularis Zhiltzova, 1974 | |
| Capnia tshukotica Zhiltzova & ..., 1978 | |
| Capnia umpqua Frison, 1942 | Umpqua Snowfly |
| Capnia variabilis (Klapálek, 1920) | ⇒ Mesocapnia variabilis Klapálek, 1920 |
| Capnia vernalis Newport, 1848 | Belly Snowfly |
| Capnia vidua Klapálek, 1904 | |
| Capnia vidua anglica Aubert, 1950 | |
| Capnia vidua brachyptera Hynes, 1955 | |
| Capnia vidua collarti Aubert, 1950 | |
| Capnia vidua rilensis Raušer, 1955 | |
| Capnia vidua vidua Klapálek, 1904 | |
| Capnia willametta Jewett, 1955 | Willamette Snowfly |
| Capnia yasumatsui Kohno, 1951 | |
| Capnia zaicevi Klapálek, 1914 | |
| Capniella endemica Zapekina-Dul..., 1955 | |
| Capniella ghilarovi Zhiltzova, 1988 | |
| Capniella nodosa Klapálek, 1920 | |
| Capnioneura aptera Berthélemy, 1969 | |
| Capnioneura balcanica macedonica (Ikonomov, 1978) | ⇒ Capnioneura balkanica macedonica Ikonomov, 1978 |
| Capnioneura balkanica Baumann & Ka..., 1975 | |
| Capnioneura balkanica balkanica Baumann & Ka..., 1975 | |
| Capnioneura balkanica macedonica Ikonomov, 1978 | |
| Capnioneura bolkari Vinçon & Sivec, 2011 | |
| Capnioneura brachyptera Despax, 1932 | |
| Capnioneura caucasica Zhiltzova, 1964 | |
| Capnioneura gelesae Berthélemy &..., 1984 | |
| Capnioneura gouanerae Vinçon & Sivec, 2011 | |
| Capnioneura libera Navas, 1909 | |
| Capnioneura macedonica Ikonomov, 1978 | |
| Capnioneura mitis Despax, 1932 | |
| Capnioneura narcea Vinçon & Sán..., 2002 | |
| Capnioneura nemuroides Ris, 1905 | |
| Capnioneura petitpierrae | |
| Capnioneura petitpierreae Aubert, 1960 | |
| Capnioneura petricola Giudicelli, 1967 | |
| Capnioneura valandovi Ikonomov, 1978 | |
| Capniopsis schilleri | |
| Capnopsis balcanica Zwick, 1984 | |
| Capnopsis schilleri Rostock, 1892 | |
| Capnopsis schilleri archaica Zwick, 1984 | |
| Capnopsis schilleri balcanica Zwick, 1984 | |
| Capnopsis schilleri schilleri Rostock, 1892 | |
| Capnura anas Nelson & Bau..., 1987 | Duckhead Snowfly |
| Capnura elevata Frison, 1942 | Thicklimb Snowfly |
| Capnura intermontana Nelson & Bau..., 1987 | Intermountain Snowfly |
| Capnura manitoba Claassen, 1924 | Manitoba snowfly |
| Capnura venosa Banks, 1900 | Falcate Snowfly |
| Dobbertiniopteryx capniomimus ♰ J. Ansorge, 1993 | |
| Eocapnia nivalis Ueno, 1929 | |
| Eucapnopsis brevicauda Claassen, 1924 | Short-tailed snowfly |
| Eucapnopsis stigmatica Okamoto, 1922 | |
| Isocapnia abbreviata Frison, 1942 | Shortlimb Snowfly |
| Isocapnia agassizi Ricker, 1943 | Agassiz Snowfly |
| Isocapnia aptera Zhiltzova, 1969 | |
| Isocapnia arcuata Zhiltzova, 1975 | |
| Isocapnia crinita Needham & Cl..., 1925 | Hooked Snowfly |
| Isocapnia grandis Banks, 1907 | Giant Snowfly |
| Isocapnia guentheri Joost, 1970 | |
| Isocapnia hyalita Ricker, 1959 | Hyalite Snowfly |
| Isocapnia integra Hanson, 1943 | Alberta Snowfly |
| Isocapnia kudia Ricker, 1959 | Lambert's crazyweed |
| Isocapnia mogila Ricker, 1959 | Irregular Snowfly |
| Isocapnia orientalis Zhiltzova, 1975 | |
| Isocapnia palousa Zenger & Bau..., 2004 | Palouse Snowfly |
| Isocapnia rickeri Zenger & Bau..., 2004 | Umatilla Snowfly |
| Isocapnia sibirica Zapekina-Dul..., 1955 | |
| Isocapnia spenceri Ricker, 1943 | Chilliwack Snowfly |
| Mesocapnia altaica Zapekina-Dul..., 1955 | |
| Mesocapnia autumna Baumann & Ga..., 1970 | Autumn Snowfly |
| Mesocapnia lapwae Baumann & Ga..., 1970 | Lapwai Snowfly |
| Mesocapnia oenone Neave, 1929 | Wine Snowfly |
| Mesocapnia porrecta Jewett, 1954 | Stretched Snowfly |
| Mesocapnia projecta Frison, 1937 | Spined Snowfly |
| Mesocapnia silvatica Raušer, 1968 | |
| Mesocapnia variabilis Klapálek, 1920 | Variable Snowfly |
| Mesocapnia yoloensis Baumann & Ga..., 1970 | Yolo Snowfly |
| Nemocapnia carolina Banks, 1938 | Southern Snowfly |
| Neofulla biloba Aubert, 1960 | |
| Neofulla spinosa Aubert, 1960 | |
| Paracapnia angulata Hanson, 1961 | Angulate Snowfly |
| Paracapnia disala Jewett, 1962 | Dirty Snowfly |
| Paracapnia ensicala Jewett, 1962 | Sword Snowfly |
| Paracapnia khorensis Zhiltzova, 1972 | |
| Paracapnia leisteri Potikha & Zh..., 2005 | |
| Paracapnia opis Newman, 1839 | Northeastern snowfly |
| Paracapnia recta Zhiltzova, 1984 | |
| Paracapnia sikhotensis Zhiltzova, 1978 | |
| Rovnocapnia ambita ♰ N. D. Sinits..., 2009 | |
| Rovnocapnia atra ♰ N. D. Sinits..., 2009 | |
| Spaniocerca hamishi McLellan, 2000 | |
| Takagripopteryx imamurai Kohno, 1954 | |
| Takagripopteryx zhuikovae Zhiltzova, 1980 | |
| Tasmanocerca bifasciata Kimmins, 1951 | |
| Utacapnia columbiana Claassen, 1924 | Columbian Snowfly |
| Utacapnia imbera Nebeker & Ga..., 1965 | Scappoose Snowfly |
| Utacapnia poda Nebeker & Ga..., 1965 | Gunnison Snowfly |
| Utacapnia trava Nebeker & Ga..., 1965 | Yellowstone Snowfly |
| Zwicknia acuta Murányi & Orci, 2014 | |
| Zwicknia avilensis Reding, Pard..., 2021 | |
| Zwicknia bifrons Newman, 1838 | |
| Zwicknia gattolliati Vinçon & Red..., 2018 | |
| Zwicknia komica Murányi & Bo..., 2014 | |
| Zwicknia kovacsi Murányi & Ga..., 2014 | |
| Zwicknia ledoarei Reding, Laun..., 2016 | |
| Zwicknia rupprechti Murányi, Orc..., 2014 | |
| Zwicknia sevanica Zhiltzova, 1964 | |
| Zwicknia tuberculata Zhiltzova, 1964 | |
| Zwicknia turkestanica Kimmins, 1950 | |
| Zwicknia turkestanica brevicula Berthélemy &..., 1982 | |
| Zwicknia turkestanica turkestanica Kimmins, 1950 | |
| Zwicknia westermanni Boumans & Mu..., 2014 | |
