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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• Filename- set to the image's file name (this is not used anywhere, but helps to identify which image this piece of content is associated with).
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Cerceris arenaria and C. rybyensis are the most common and most widely distributed species in their genus in Britain.

The genus Ectemnius contains some of our larger and more colourful aculeates. All ten British species in this genus have black gasters which are boldly marked with yellow transverse bands or paired lateral spots. Most are locally distributed throughout much of southern England, the number of species and their degree of abundance decreasing northwards. Only three species are known from Ireland (Stelfox, 1927) and a similar number from Scotland.

Of the three species of Crabro which occur in Britain, C. cribrarius is the largest. Male Crabro can be readily distinguished from other medium-sized British and Irish sphecids by their conspicuous fore-tibial shields.