The adults reach 15–17 mm (0.59–0.67 in) long. They have three yellow bands on an otherwise black abdomen and thus closely resemble wasps in a form of mimicry. The first two bands are completely or partially interrupted by a black wedge. The head has feather-like antennae and the wings have darkened patches in the middle and on the tip.
^Stubbs, Alan E; Falk, Steven J (1983). British Hoverflies: An Illustrated Identification Guide (1st ed.). London: British Entomological and Natural History Society. p. 253. ISBN9780950289137.