|scientific name Diplous aterrimus |
Among gravel near the edge of rapidly running brooks and rivers, at lower elevations.
Adults of this species have been collected from May to October.
Black, elytra often rufinistic, and only tarsi, extreme tip of palps and extreme base of outer antennal segemnts paler, piceous. Elytra parallel-sided, microsculpture strong, nearly granulate at base. Male with meta-trochanters more or less pointed, about half as long as femora.
Overwinters in the adult stage.
Both larvae and adults are predatory.
This species is found in northwestern United States and western Canada. In Alberta this species is found in the southern half.
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