Appearance
Wing length 6.5-8.25 mm.Hind femora are swollen and deep. Hind tibiae strongly curved and the ventral surface with
closely-set short black hairs for the whole length. The abdomen is short tergites 2-4 with a pair of pink or orange-brown marks. The legs are black with yellow knees and yellow tarsi.
Distribution
Fennoscandia South to the Pyrenees and from Ireland East through Northern, Central and Southern Europe across the Palearctic into Russia and the Russian Far East and Sakhalin and Japan. In the Nearctic from Alaska to Nova Scotia and South to California.
Behavior
The habitat is forest wetland. Adults frequent sunlit foliage of bushes on trunks of fallen trees beside water and settle on damp mud at the water's edge.Food
Flowers visited include white umbellifers, "Caltha", "Anemone nemorosa", "Euphorbia amygdaloides", "Ranunculus", "Rubus idaeus", "Potentilla erecta", "Sorbus aucuparia"and "Taraxacum". Flies from the beginning of May to the end of September.References:
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