1a. Wings uniformly brown; cervical gills 12-15 times as long as wide. Found in small headwater streams and spring fed creeks. Not reported from the county, but may be present. | |
1b. Wings mottled with dark bands; cervical gills less than 10 times as long as wide. | |
2a. Gills with 3 or 4 branches. | |
2b. Gills simple and unbranched. | |
3a. Epiproct with two sclerotized dorsal hooks. | |
3b. Epiproct entirely membranoous dorsally. |
ReferencesBaumann, RW Gaufin, AR, Surdick, RF 1977: The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208. PDF Modified from the key on page 42.Good LinksKey to Zapada MalesKey to Zapada Nymphs |