[2] External images For terms see Morphology of Diptera Wing length 5·75-6·75 mm.

[7] South Finland, Ireland, Britain and the Atlantic seaboard of Europe from Denmark to the Pyrenees and northern Spain.

[8][9] Habitat: Woodland and wetland; fen carr, areas with flushes and streams in deciduous forest.

Alnus Salix carr and poorly-drained scrub, streamsides in woodland.

Flowers visited include white umbellifers, Filipendula, Ilex, Iris, Ranunculus.