[1][2] External images For terms see Morphology of Diptera Wing length 4-5 ·75 mm.

Antennomere 3 pointed Female tergite 5 with a small incision at hind margin.

[8][9] Habitat: Streams in Fagus woodland, riparian gallery forest, springs and flushes in fen and raised bog.

[10] Flowers visited include white umbellifers, Fragaria, Galium, Potentilla erecta, Ranunculus.

[11] The flight period is May/ to August.The larva is associated with springs and flushes, where it occurs in wet, organically-enriched mud.