| Acroneuria abnormis Newman, 1838 | Common Stone |
| Acroneuria arenosa Pictet, 1841 | Eastern Stone |
| Acroneuria californica (Banks, 1905) | ⇒ Calineuria californica Banks, 1905 |
| Acroneuria frisoni Stark & Brown, 1991 | Central Stone |
| Acroneuria pacifica (Banks, 1900) | ⇒ Hesperoperla pacifica Banks, 1900 |
| Acroneuria perplexa Frison, 1937 | Enigmatic Stone |
| Agnetina annulipes Hagen, 1861 | Southern Stone |
| Allocapnia aurora Ricker, 1952 | Aurora Snowfly |
| Allocapnia granulata Claassen, 1924 | Common Snowfly |
| Allocapnia nivicola Fitch, 1847 | Brook Snowfly |
| Allocapnia pygmaea Burmeister, 1839 | Pygmy Snowfly |
| Allocapnia recta Claassen, 1924 | Eastern Snowfly |
| Allocapnia rickeri Frison, 1929 | Midwest Snowfly |
| Allocapnia vivipara Claassen, 1924 | Shortwing Snowfly |
| Allocapnia wrayi Ross, 1964 | Pristine Snowfly |
| Alloperla delicata Frison, 1935 | Convoluted barbula moss |
| Alloperla elevata (Frison, 1935) | ⇒ Alloperla severa Hagen, 1861 |
| Alloperla fraterna Frison, 1935 | Cascades Sallfly |
| Alloperla serrata Needham & Cl..., 1925 | Sawtooth Sallfly |
| Alloperla severa Hagen, 1861 | Western Sallfly |
| Arcynopteryx aurea (Smith, L.W., 1917) | ⇒ Perlinodes aureus Smith, 1917 |
| Arcynopteryx parallela (Frison, 1936) | ⇒ Skwala americana Klapálek, 1912 |
| Arcynopteryx picticcps | |
| Arcynopteryx sctucna | |
| Attaneuria ruralis Hagen, 1861 | Giant Stone |
| Bolshecapnia sasquatchi Ricker, 1965 | Sasquatch Snowfly |
| Calineuria californica Banks, 1905 | Western Stone |
| Calliperla luctuosa Banks, 1906 | Coast Stripetail |
| Capnia confusa Claassen, 1936 | Widespread Snowfly |
| Capnia elongata Claassen, 1924 | Cascades Snowfly |
| Capnia excavata Claassen, 1924 | Saddleback Snowfly |
| Capnia gracilaria Claassen, 1924 | Slender Snowfly |
| Capnia licina Jewett, 1954 | Bent Snowfly |
| Capnia melia Frison, 1942 | Northwest Snowfly |
| Capnia nana Claassen, 1924 | Dwarf Snowfly |
| Capnia nana nana Claassen, 1924 | |
| Capnia oregona Frison, 1942 | Oregon Snowfly |
| Capnia promota Frison, 1937 | Pacific Snowfly |
| Capnia sextuberculata Jewett, 1954 | Six-knobbed Snowfly |
| Capnura elevata Frison, 1942 | Thicklimb Snowfly |
| Capnura venosa Banks, 1900 | Falcate Snowfly |
| Cascadoperla trictura Hoppe, 1938 | Cascades Stripetail |
| Claassenia sabulosa Banks, 1900 | Shortwing Stone |
| Cultus pilatus Frison, 1942 | Vedder Springfly |
| Cultus tostonus Ricker, 1952 | Toston Springfly |
| Despaxia augusta Banks, 1907 | Autumn Needlefly |
| Doddsia occidentalis Banks, 1900 | Western Willowfly |
| Doroneuria baumanni Stark & Gaufin, 1974 | Cascades Stone |
| Doroneuria theodora Needham & Cl..., 1922 | Montana Stone |
| Eucapnopsis brevicauda Claassen, 1924 | Short-tailed snowfly |
| Frisonia picticeps Hanson, 1942 | Painted Springfly |
| Haploperla chilnualna Ricker, 1952 | Yosemite Sallfly |
| Helopicus subvarians Banks, 1920 | Vernal Springfly |
| Hesperoperla pacifica Banks, 1900 | Golden Stone |
| Isocapnia abbreviata Frison, 1942 | Shortlimb Snowfly |
| Isocapnia agassizi Ricker, 1943 | Agassiz Snowfly |
| Isocapnia grandis Banks, 1907 | Giant Snowfly |
| Isocapnia palousa Zenger & Bau..., 2004 | Palouse Snowfly |
| Isocapnia rickeri Zenger & Bau..., 2004 | Umatilla Snowfly |
| Isocapnia spenceri Ricker, 1943 | Chilliwack Snowfly |
| Isocapnia vedderensis Ricker, 1943 | Vedder Snowfly |
| Isogenoides colubrinus Hagen, 1874 | Blackfoot Springfly |
| Isogenoides elongatus Hagen, 1874 | Elongate Springfly |
| Isogenoides frontalis Newman, 1838 | Hudsonian springfly |
| Isoperla bifurcata Szczytko & S..., 1979 | Forked Stripetail |
| Isoperla fulva Claassen, 1937 | Western Stripetail |
| Isoperla fusca Needham & Cl..., 1925 | Swamp loosestrife |
| Isoperla gravitans Needham & Cl..., 1925 | Olympia Stripetail |
| Isoperla marmorata Needham & Cl..., 1925 | Red Stripetail |
| Isoperla mormona Banks, 1920 | Mormon Stripetail |
| Isoperla petersoni Needham & Ch..., 1927 | Crosswort |
| Isoperla pinta Frison, 1937 | Checkered Stripetail |
| Isoperla rainiera (Jewett, 1954) | ⇒ Isoperla rainieri Jewett, 1954 |
| Isoperla rainieri Jewett, 1954 | |
| Isoperla sobria Hagen, 1874 | Colorado Stripetail |
| Isoperla sordida Banks, 1906 | Notched Stripetail |
| Isoperla tilasqua Szczytko & S..., 1979 | Oregon Stripetail |
| Kathroperla perdita Banks, 1920 | Longhead Sallfly |
| Kathroperla takhoma Stark & Surdick, 1987 | Slenderhead Sallfly |
| Kogotus nonus Needham & Cl..., 1925 | Smooth Springfly |
| Lednia borealis Baumann & Ko..., 2010 | Northern Forestfly |
| Malenka bifurcata Claassen, 1923 | Forked Forestfly |
| Malenka californica Claassen, 1923 | California Forestfly |
| Malenka cornuta Claassen, 1923 | Horned Forestfly |
| Malenka flexura Claassen, 1923 | Twisted Forestfly |
| Malenka perplexa Frison, 1936 | Coast Forestfly |
| Malenka tina Ricker, 1952 | Tiny Forestfly |
| Malenka wenatchee Ricker, 1965 | Wenatchee Forestfly |
| Megaleuctra complicata Claassen, 1937 | Pacific Needlefly |
| Megaleuctra kincaidi Frison, 1942 | Cascades Needlefly |
| Megaleuctra stigmata Banks, 1900 | Giant Needlefly |
| Megarcys irregularis Banks, 1900 | Rainier Springfly |
| Megarcys signata Hagen, 1874 | Larimide Springfly |
| Megarcys subtruncata Hanson, 1942 | Truncate Springfly |
| Megarcys yosemite Needham & Cl..., 1925 | Yosemite Springfly |
| Mesocapnia autumna Baumann & Ga..., 1970 | Autumn Snowfly |
| Mesocapnia bakeri Banks, 1918 | Pomona 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 |
| Moselia infuscata Claassen, 1923 | Hairy Needlefly |
| Neaviperla forcipata (Neave, 1929) | ⇒ Suwallia forcipata Neave, 1929 |
| Neoperla robisoni Poulton & St..., 1986 | Slender Stone |
| Osobenus yakimae Hoppe, 1938 | Yakima Springfly |
| Ostrocerca dimicki Frison, 1936 | Hooked Forestfly |
| Ostrocerca foersteri Ricker, 1943 | Cascades Forestfly |
| Paracapnia ensicala Jewett, 1962 | Sword Snowfly |
| Paragnetina fumosa Banks, 1902 | Smoky Stone |
| Paraleuctra forcipata Frison, 1937 | Bullshorn Needlefly |
| Paraleuctra occidentalis Banks, 1907 | Western Needlefly |
| Paraleuctra projecta Frison, 1942 | Rockies Needlefly |
| Paraleuctra vershina Gaufin & Ricker, 1974 | Summit Needlefly |
| Paraperla frontalis Banks, 1902 | Hyporheic Sallfly |
| Paraperla wilsoni Ricker, 1965 | Chilliwack Sallfly |
| Perlesta armitagei Grubbs & DeWalt, 2018 | Brian's Stone |
| Perlesta placida Hagen, 1861 | Freckled Stone |
| Perlinella drymo Newman, 1839 | Striped Stone |
| Perlinodes aureus Smith, 1917 | Longgill Springfly |
| Perlomyia collaris Banks, 1906 | Black Needlefly |
| Perlomyia utahensis Needham & Cl..., 1925 | Swamp loosestrife |
| Pictetiella lechleitneri Stark & Kond..., 2004 | Talol Springfly |
| Plumiperla diversa Frison, 1935 | Margined Sallfly |
| Podmosta decepta Frison, 1942 | Least Forestfly |
| Podmosta delicatula Claassen, 1923 | Delicate Forestfly |
| Podmosta obscura Frison, 1936 | Brown-veined Forestfly |
| Prostoia besametsa Ricker, 1952 | Banded Forestfly |
| Prostoia similis Hagen, 1861 | Longhorn Forestfly |
| Pteronarcella badia Hagen, 1874 | Least Salmonfly |
| Pteronarcella regularis Hagen, 1874 | Dwarf Salmonfly |
| Pteronarcys californica Newport, 1848 | Giant Salmonfly |
| Pteronarcys dorsata Say, 1823 | American Salmonfly |
| Pteronarcys princeps Banks, 1907 | Ebony Salmonfly |
| Rickera sorpta Needham & Cl..., 1925 | Palestripe Springfly |
| Setvena tibialis Banks, 1914 | Olympic Springfly |
| Skwala americana Klapálek, 1912 | American Springfly |
| Skwala curvata Hanson, 1942 | Curved Springfly |
| Soliperla cowlitz Stark & Gust..., 2004 | Skamania Roachfly |
| Soliperla cowlitza | |
| Soliperla fenderi Jewett, 1955 | Rainier Roachfly |
| Soyedina carolinensis Claassen, 1923 | Carolina Forestfly |
| Soyedina interrupta Claassen, 1923 | Broken Forestfly |
| Soyedina nevadensis Claassen, 1923 | Nevada Forestfly |
| Soyedina producta Claassen, 1923 | Knobbed Forestfly |
| Soyedina washingtoni Claassen, 1923 | Vernal Forestfly |
| Strophopteryx fasciata Burmeister, 1839 | Little red stonefly |
| Suwallia autumna Hoppe, 1938 | Autumn Sallfly |
| Suwallia dubia Frison, 1935 | Pale Sallfly |
| Suwallia forcipata Neave, 1929 | Forceps Sallfly |
| Suwallia lineosa Banks, 1918 | Lined Sallfly |
| Suwallia pallidula Banks, 1904 | Yellow Sallfly |
| Suwallia starki Alexander & ..., 1999 | Gallatin Sallfly |
| Sweltsa adamantea Surdick, 1995 | Washington Sallfly |
| Sweltsa borealis Banks, 1895 | Boreal Sallfly |
| Sweltsa coloradensis Banks, 1898 | Colorado Sallfly |
| Sweltsa exquisita Frison, 1935 | Exquisite Sallfly |
| Sweltsa fidelis Banks, 1920 | Mountain Sallfly |
| Sweltsa lyrata Stark & Baumann, 2018 | |
| Sweltsa occidens Frison, 1937 | Alpine Sallfly |
| Sweltsa oregonensis Frison, 1935 | Oregon Sallfly |
| Sweltsa pacifica Banks, 1895 | Pacific Sallfly |
| Sweltsa revelstoka Jewett, 1955 | Canadian Sallfly |
| Taenionema atlanticum Ricker & Ross, 1975 | Atlantic Willowfly |
| Taenionema jewetti Stanger & Ba..., 1993 | Columbia Willowfly |
| Taenionema kincaidi Hoppe, 1938 | Pale Willowfly |
| Taenionema oregonense Needham & Cl..., 1925 | Oregon Willowfly |
| Taenionema pacificum Banks, 1900 | Pacific Willowfly |
| Taenionema pallidum Banks, 1902 | Common Willowfly |
| Taeniopteryx burksi Ricker & Ross, 1968 | Eastern Willowfly |
| Taeniopteryx maura Pictet, 1841 | Spinyleg Willowfly |
| Taeniopteryx nivalis Fitch, 1847 | Boreal Willowfly |
| Taeniopteryx parvula Banks, 1918 | Hooked Willowfly |
| Triznaka pintada Ricker, 1952 | Rough Sallfly |
| Triznaka signata Banks, 1895 | Striped Sallfly |
| Utacapnia imbera Nebeker & Ga..., 1965 | Scappoose Snowfly |
| Visoka cataractae Neave, 1933 | Cataract Forestfly |
| Yoraperla brevis Banks, 1907 | Least Roachfly |
| Yoraperla mariana Ricker, 1943 | Brown Roachfly |
| Yoraperla nigrisoma Banks, 1948 | Black Roachfly |
| Yoraperla siletz Stark & Nelson, 1994 | Coastal Roachfly |
| Zapada cinctipes Banks, 1897 | Common Forestfly |
| Zapada columbiana Claassen, 1923 | Columbian Forestfly |
| Zapada cordillera Baumann & Ga..., 1971 | Cordilleran Forestfly |
| Zapada frigida Claassen, 1923 | Frigid Forestfly |
| Zapada glacier Baumann & Ga..., 1971 | Glacier Forestfly |
| Zapada haysi Ricker, 1952 | Intermountain Forestfly |
| Zapada oregonensis Claassen, 1923 | Oregon Forestfly |
