Psydrus piceus LeConte. This species is widely distributed west of the Rocky Mountains where it is usually found under the bark of relatively large coniferous trees. It is also found within the boreal regions east of the Rockies but is very rarely collected there. This species belongs to the same tribe as Nomius pygmaeus but unlike that species, the adults do not emit an unpleasant smell.
Yves Bousquet
CC BY 3.0
Bousquet Y (2012) Catalogue of Geadephaga (Coleoptera: Adephaga) of America, north of Mexico. ZooKeys 245: 1-1722. <a href="//doi.org/10.3897/zookeys.245.3416" class="extiw" title="doi:10.3897/zookeys.245.3416">doi:10.3897/zookeys.245.3416</a>