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.

A small, all black, scantily-haired bee with dirty-yellow scopae on the hind legs on the female. The male has distinctive pegs underneath the hind femora. In dull weather males are often found curled up in the flowers of yellow Asteraceae, especially hawkweeds. They may stay shut inside the closed flower overnight.

A rather small, metallic green bee, with white tomentose hair bands on the gaster. Great care must be taken, particularly with females, when separating this species from the common H. tumulorum. Best identified from the male, which should always be dissected to show the vital character in the genitalia.

A rather small, metallic green bee, with white tomentose hair bands on the gaster. The relationship with H. confusus is close and great care must be taken, particularly with females, when identifying specimens collected in southern Britain. May only be reliably determined from the male, which should always be dissected to show the vital character in the genitalia.

Formerly known as Hylaeus spilotus Forster, 1871 - see recent name changes. A close relative of Hylaeus dilatatus but readily distinguished in both sexes by the highly polished surface (devoid of fine microreticulation) between the mesontal punctures. There are other distinguishing characters involving the shape and patterning of the antennal scapes in the males.

Previously known as Hylaeus annularis (Kirby, 1802) - see recent name changes. British representatives of the subgenus Lambdopsis are restricted to Hylaeus dilatatus and H. annularis (formerly H. spilotus).The females of both differ from other British Hylaeus in the reduced, circular (not wedge-shaped or linear) paraocular markings; the males have greatly dilated, yellow and black-marked, sub-rectangular antennal scapes (… Read more

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Cerceris arenaria and C. rybyensis are the most common and most widely distributed species in their genus in Britain.