|scientific name Nebria gyllenhali castanipes |
Usually confined to the stony margins of running, cold water.
June to September.
Member of the gyllenhali group. Piceous or almost black, completely unmetallic, all appeandages rufous, femora darkened, margins of prothorax often paler, elytra sometimes more or less rufinistic. Prothorax with lateral seta, sides sinuate in basal half and hind angles right, or slightly obtuse, but sharp at tip; meta-coxae and sternites 3-5 unisetose; and wings full. Length 8.6 to 12.0 mm.
Overwintering occurs in the larval stage, with most immature individuals found early in summer.
Both larvae and adults are predatory.
Transamerican in the northern states; transcanadian, though not quite reaching the Pacific coast. In Alberta this species ranges throughout, the exception being the dry south east region.
Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.