Cheilosia caerulescens explained

Cheilosia caerulescens is a Palearctic hoverfly.

Description

A bluish-grey Cheilosia with dark legs and, sometimes, pale knees There are distinct dark shades, varying in extent over the two cross veins of the wings. The lower face is strongly protruding, the third antennal segment is brownish-red .It is bare-eyed.^{[1] [2] [3] [4] [5] [6] [7]}

Distribution and biology

It is found from Britain and the Netherlands south to the Pyrenees and France east through Central Europe to European Russia and southeast to Yugoslavia and Roumania.^{[8] [9]} The habitat is subalpine grassland and heath to above 2000m. where it flies from April to September, with peaks in May and August. The larvae feed internally on Sempervivum

External links

Images representing Cheilosia caerulescens

Notes and References

1. 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.
2. Book: Stubbs, Alan E. . Falk, Steven J. . amp . 1983 . British Hoverflies: An Illustrated Identification Guide . British Entomological & Natural History Society. 0-9502891-3-2. 2nd (revised). 271, xvpp .
3. 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. .
4. Van Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.addendum
5. Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf
6. [Fauna Europaea]
7. Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
8. [Fauna Europaea]
9. Speight . M.C.D. . 2011 . Species accounts of European Syrphidae (Diptera). Syrph the Net, the database of European Syrphidae . 65 . 285pp .