Eucera tuberculata (FABRICIUS 1793); Eucera difficilis DUFOUR, FRIESE & PÉREZ 1896; Eucera atricollis FRIESE 1922
The extraordinarily long antennae of male Eucera species (when laid back these reaching the apex of the gaster) readily distinguish these bees from males of any other British bee genus. The male clypeus and labrum are bright yellow. In the female, the antennae are considerable shorter, when laid back their distal segments only reaching the scutellum; head entirely black.
Very local but sometimes numerous where found in southern England and south Wales. This species does not occur in Ireland. Widespread in Eurasia, the range extending east to Siberia and China (Wu 2000). A map illustrating its distribution within the western Palaearctic has been published (Kullenberg, Buel & Tkalcu 1984).