Rhyacophila alberta Banks 1918

Common in the Rockies.

Adults fly from mid-August to mid-September.

Extends from Alaska to Colorado and Utah, largely being confined to the Rocky Mountains. In Alberta, this species is found in the mountains and foothills between 4000 and 6500 feet in altitude (Nimmo, 1971).

Adult antennae are pale yellow with the vertex of the head mottled red-brown. Male forewings are pale yellowish brown, heavily irrorate with darker areas in the veins. In male genitalia, the dorsal lobe of the clasper's distal article is directed meso-anterad (Nimmo, 1971).

All sizes of mountain streams.

Larvae are probably predacious.