|scientific name Trachypachus holmbergi |
A xerophilus species, on open or slightly shaded ground, usually moraine, with sparse vegetation.
Adults have benn collected in April to June.
This is the only species of Trachypachus found in Alberta. The antennae only have scattered stiff setae, lacking dense, depressed pubescence on the outer seven antennomeres. The metacoxae are extended laterally to meet the margins of elytra. Black or very dark piceous, tibiae usually brownish, upper surface shiny brass. Prothorax with three lateral setigerous punctures each side; anterior and posterior margins fringed with short setae. Elytra with varying number (3-12) of irregular rows of punctures, effacing at apex. Length 3.8 to 5.8 mm.
This species overwinters in the adult stage.
Both larvae and adults are predatory.
This species is found in Alaska and western United States and in western Canada, including the north. In Alberta this species is recorded from the Edmonton area and in the extreme north east corner of the provinve.
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