Previously known as H. integrum (Dahlbom, 1854). Identification keys and general biology are given in Morgan (1984), Gauld and Bolton (1988), Kunz (1994) and Linsenmaier (1997).
Dorset to West Sussex, north to Cumberland and South-east Yorkshire. Channel Islands.
Overseas found in many parts of Europe, particularly in the north (including Sweden, Finland, Denmark, The Netherlands, Belgium, France, Germany, Switzerland, Italian Alps, Poland, Austria, and Hungary).