Passaloecus angustus GUSSAKOVSKIJ 1952
Passaloecus species are small to very small, elongate, black wasps which nest particularly in beetle borings in posts and other cavities, and prey on aphids. The biology of this species is described by Merisuo (1973), and keys to the European species groups of the genus Passaloecus are in Merisuo (1974).
Entirely restricted to south-eastern England, with most modern records from east Norfolk, the Thames corridor and Dungeness.
Abroad, this species is widely distributed throughout central and northern Europe, but found only rarely. Also occurs in western Russia, eastwards to Uzbekistan (Lomholdt 1975-76).