|scientific name Hydropsyche oslari |
Any flowing water.
Adults fly from early June to mid-September.
Male forewings are pale grey-brown and uniformly irrorate. Antennae are brownish cream, vertex dark brown anteriorly and yellow-brown posteriorly and thorax is a rich red-brown, yellow-brown laterally. The legs are yellowish cream with yellow to cream spurs. The male aedeagus does not have black spines or hooks. There is a pair of small, dorsal membranous lobes posterad of the tip (Nimmo, 1987).
Larvae are omnivorous.
This western species is found throughout the Cordillera, from Alaska south to Mexico. In Alberta, recorded from the open plains, foothills and the boreal forest.
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