Conservation Status
المقدمة من University of Alberta Museums
Most likely common.
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Distribution
المقدمة من University of Alberta Museums
In North America, from Alaska south to Nevada. B. occidentalis, is mainly confined to western Canada, from Manitoba west to British Columbia and north to the North West Territories (Schmid, 1983).
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General Description
المقدمة من University of Alberta Museums
In adults, the top of the head and thorax are grey-brown and covered with distinct, white hairs. The antennae are dark brown with weak rust-coloured rings. The base of the male clasper is long and extended as a dorsal process, with the horizontal extension curving mesad.
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Habitat
المقدمة من University of Alberta Museums
Restricted to running waters.
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Trophic Strategy
المقدمة من University of Alberta Museums
The larvae are omnivorous, obtaining their food either by filter feeding or scraping.
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