[1][2] External images For terms see Morphology of Diptera Wing length 7·25–9 mm.

Female tergites black, pale abdominal markings absent.

[5] [6] [7][8] Palearctic Southern Norway, Sweden, Finland and Denmark South to Belgium.

[9][10] Habitat Fagus and Quercus ancient woodlands, also in extensive parks in with overmature trees.

[11] Arboreal, but descends to visit flowers of Alnus, Anemone nemorosa, Carpinus, Chrysosplenium oppositifolium, Corylus, Hamamelis mollis, Lonicera xylosteum, Populus tremula, Salix, Sambucus, Tussilago.