Previously classified in the genera Alysson and Dienoplus. A small red and black wasp, typically with a white scutellum and three white spots on the abdomen rendering it distinctive. Usually encountered in dry sandy locations where it is a frog-hopper predator.
Recorded widely but sparingly across England and Wales, and extending as far north as Grantown, Elgin in Scotland. Also the Channel Islands (Jersey and Guernsey) and a few sites in Ireland (Waterford, Wexford and Wicklow). A southern bias is exhibited and most records are concentrated within coastal districts or heathy districts inland. Local in southern England, becoming very scarce in the northern part of its range, though with a cluster of recent records in Yorkshire through the efforts of M E Archer. It is rarely common anywhere, though it is easily overlooked. Overseas, it is widely reported from north and central Europe; also southern Siberia and Japan (Lomholdt, 1975-76).