Superfamily STAPHYLINOIDEA (atlas of beetles of Russia)
Family Staphylinidae (atlas of beetles of Russiaи)
Subfamily Omaliinae
Arpedium quadrum (Gravenhorst, 1806)
Volgograd reg., N Kalach-on-Don, 17-18.IX.1997, K.A. Grebennikov
Photo from the site of Konstantin Grebennikov http://rove.front.ru