External images
For terms see Morphology of Diptera
The thorax and abdomen are lustrous metallic green to golden, frequently with reddish reflections. The tergite at the tip of the abdomen is yellowish-green with blue and purple reflections except around the margin. In the male the face lacks a median tubercle.
The third segment of antennae below for greater or lesser part narrow and part yellow towards the tip. Middle segment of tarsi yellow. Body length 5.0 to 7.0 mm.[1][2] The larva is described and figured by Rotheray (1994).[3][4][5][6][7]
Wetland, margins of streams and pools, springs and spring-fed ponds.
Biology
Flies in a zigzag, darting fashion from May to August. Flowers visited are white umbellifers Matricaria, Ranunculus.
[10]
References
^Van der Goot,V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no.32: 275pp. Amsterdam.
^Stubbs, Alan E. & Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide (2nd (revised) ed.). British Entomological & Natural History Society. p. 271, xvpp. ISBN0-9502891-3-2.
^Rotheray G., 1993 Colour Guide to Hoverfly Larvae Diptera, Syrphidae in Britain and Europe Dipterists Forum pdf
^Bei-Bienko, G.Y. & Steyskal, G.C. (1988a) Keys to the Insects of the European Part of the USSR, Volume V: Diptera and Siphonaptera, Part I. Amerind Publishing Co., New Delhi. ISBN81-205-0080-6.
^Van Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.addendum
^Van der Goot,V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no.32: 275pp. Amsterdam.
^Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf