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Show 177 Fork Pine Cr. at 21-VI-64, (N), Ida. jct SLJ and JWR; following tinguish this in occurring tarsi genus of the male segment; (2) costal and anastomosed, the black, combinations other Adults. (1) one-sixth pale; 107); and (3) (4) to the subanal of plate segments caudal filaments one and to not seven those (3) medially; front and only slightly on Mature the of (5) gill smaller head not lamellae than lamellae Of genus, one the (Eaton), g. Three well abdominal abdomen, segments only smaller; on segments on abdominal one segment one and the segment two, subequal to or shorter than (Fig. 78). thirty-four species presently assigned five 103- distinctly emarginate on those fibrilliform portion of gill the (2) gills beneath on brown, or shallow a (1) nymphs. distinct gills but when color, with second the as L-shaped (Figs. female intermediate fibrilliform portion of (4) the extending similar six; not fore not forewings in the of long as to dis Heptageniidae marked with red present; and to Valley, serve segment variable the male postero-median emargination. developed the conspicuously of of genera Basal of crossveins penes Swan N. characters one-third crossveins abdomen is never of from all Idaho: 9 mi. Heptagenia Walsh 1863 Genus The Hwy. #31, (+ ). species, . rodocki criddlei Traver, H. to this McDunnough, g. elegantula simpliciodes McDunnough, and |
