A small, black, very thin solitary wasp. Identification keys are given in Yeo & Corbet (1995), Lomholdt (1984) and Richards (1980).
A widely distributed species recorded from much of Britain, including the Scilly Isles and the Channel Islands. There is a single record from Ireland.
Overseas, recorded from Europe, North Africa and much of Asia and has been introduced into North America (Antropov, 2002).