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Show and Taxonomy This Biology cascadia Allen and Edmunds streams. same They in in collected been distinct, however, are they moderately flowing of from 56° to species has also been habitat during 65°F., gravel in E. the ventral the June They and usually found daytime temperatures 100s6 gravel and collected rock are and summer from bottom, Adults rarely. late among larger rivers with rivers and in collected uncommonly. occur in stream with been have nymphs where streams nets has and to morphological structures. The this closely related be most pattern in both the adults and mature nymphs, abdominal color and to species appears have a cold but recks. (44°F.) apparently been coilected This and swift occurs in in drift early July. Distribution Ephemerella hystrix is a from Idaho. species previously unreported (1961a:610, Fig. 28a) as extending from Idaho. twenty-four show the state across the I examined have localities of boreal western North American Allen and Edmunds distribution of but do not list this species any records specimens from six counties and which the following are representa- tive. SHOSHONE Co.: -West Fork Big Cr., 7 mi. W. ADAMS Co.: Little Wallace, 4-VII-64, (N), AVN and WCP. Goose Cr., 4 mi. S. New Meadows, 17-Vr-64, (N), AVN and WCP. Rock Flat Cr. on Ida. Hwy. #15, 2 mi. N. McCall, VALLEY Co.: Records.- |
