|scientific name Patrobus septentrionis |
Border of lakes, ponds and slow streams, on more or less clayishground with grass and veg.
Adults of this species have been collected in June and July.
Piceous to almost black, elytra often more or less rufinistic. Prothorax with complete anterior transverse impression, coarsely punctate. Elytral microsculpture isodiametric. Length 8.2-11.7 mm.
Overwinters in the adult stage.
Both larvae and adults are predatory.
This species is found in northwestern and northeastern United States and most of Canada. In Alberta this species is only known from the central region.
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