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Show 92 Records.LEMHI Coo: Pine Cr. at jct. Salmon Riv., 1 mi. SW. Shoup, Salmon Natl. For., 1/8-VII-64, (N), JKA and IRT; Opal Cr. at jct. Panther Cr., 18 mi. W. Cobalt, Salmon Natl. 12/23-VII-64, (N), For., Ameletus IRT and JKA; (+ 7). oregonensis McDunnough (Figures 4-5, 9-10, 13-14) Ameletus oregonensis McDunnough, McDunnough (1933a) series of male a Taxonomy and Traver More by species of accurate Little except that tions from all the (1935b) streams. and characters distinctive figure from .species a McDunnough (1936) Biology distinguished The this imagos collected in Oregon. adults Both Idaho described description of the nymphs. provides in 1933a:157. is the The genus in in the in are genus It keys. treated as the is easily occurring the this most dissertation. the about emerge April penes have been flattened. biology occur of in this larger species rivers and early in the spring with collec- and May. Distribution Ameletus and herein presented. nymphS apparently adults being made the species genitalia by McDunnough (1933a) are known this species in incorrect figures is other used in the male of nymphs oregonensis is a boreal western North |