[2][3] External images For terms see Morphology of Diptera Wing length Wide abdomen with yellow marks.

The male genitalia and larvae are figured by Dusek and Laska (1967).

[9][10] Habitat: Fagus, Quercus and Pinus forest and scrub.

[11] Flowers visited include umbellifers, Arbutus unedo, Filipendula, Juncus, Leontodon, Lonicera, Mentha aquatica, Rosa, Rubus, Succisa.

[12] The larvae predate aphids and the caterpillars of various small moths including Tortricidae both on trees and low-growing plants.