Conservation Status
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Rare.
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Cyclicity
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Adults fly from early August to early September.
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Distribution
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This species has only been recorded from Waterton National Park in Alberta.
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General Description
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Adult antennae are very dark with paler inter-annular sutures. Vertex of the head is almost black with slightly paler warts. In males, segment 10 is massive, apparently an extension of the dorsum of segment 9 (Nimmo, 1977).
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Habitat
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Small, shallow, subalpine creeks on gravel or bedrock.
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Trophic Strategy
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Larvae are probably predacious.
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