About Philonthus cognatus Stephens, 1832
Philonthus cognatus is a species of rove beetle first described by Stephens in 1832. Adult individuals of this species measure 8 to 10 millimeters in length. Their bodies are primarily black, with elytra that have a metallic sheen and are covered in numerous deep pits. A distinctive identifying feature of the species is the yellow underside of the first antennal segment, which contrasts with the black upper side of the segment. This is a common species in Britain, and it can also be found in Belarus.
