Previously known as Spinolia neglecta. Identification keys and general biology are given in Chapman (1869, 1871), Morgan (1984) and Kunz (1994).
Rare. From East Cornwall to Kent, and north to Cardiganshire, Denbighshire, Nottinghamshire and West Norfolk.
Overseas, the wasp occurs in Europe (including Sweden, Finland, Denmark, The Netherlands, Belgium, Luxembourg, France, Spain, Germany, Italy, Poland and Hungary); Asia; USA west of Colorado and Canada west of Ontario.