Previously Hylaeus gibbus (Saunders,1850). This species was considered by Warncke (1970) as being a subspecies of H. confusus but, morphologically, the males of each species are abundantly distinct from each other and most other authors recognise them as separate species. Sometimes both species fly together.
Confined to southern England. Generally a rare bee, though occasionally numerous in favoured heathland sites. Widely distributed throughout much of Europe, Anatolia and the Caucasus, and northern Morocco (Koster 1986).