Cyclicity
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Adults can be found from late May to late August.
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Distribution
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Widely distributed along the mountains of the west coast of North America, from Yukon south th California, east to Montana and Alberta (Schmid, 1983).
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General Description
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The body and hair of the adults are dark brown. Maxillary palps of the males reach the apex of the first article of the antennae. Forewings are uniformly dark brown to black. The male cercus is linear and evenly tapered with an oblique distal edge. The article of the clasper is not projected beyond the adjacent lobes of the proximal article (Schmid, 1983).
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Habitat
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Flowing waters, often cold.
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Trophic Strategy
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Larvae feed on mosses.
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