[1][2] External images For terms see Morphology of Diptera The wing length is 5·75-7·5 mm.

[4] See references for determination'[5] [6] [7][8] Palearctic Fennoscandia, Britain and Ireland, Schwarzwald (Germany), the Czech Republic, France (Pyrenees and Alps), Switzerland, Liechtenstein.

North and Central Siberia to Kamchatka.Nearctic Alaska and Canada, Rocky mountains to as far as Colorado.

[9][10] Habitat: Abies, Picea, Pinus forest and deciduous woodland (Alnus, Betula Salix).

[11] Arboreal, but descends to visit flowers of Acer pseudoplatanus, Galium, Ilex, Prunus spinosa, Ranunculus, Salix, Stellaria, Taraxacum.