Cheilosia vernalis

Cheilosia vernalis
	Cheilosia vernalis North Wales
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Diptera
Family:	Syrphidae
Subfamily:	Eristalinae
Tribe:	Rhingiini
Genus:	Cheilosia
Species:	C. vernalis
Binomial name
	Cheilosia vernalis; (Fallen, 1817).

Cheilosia vernalis is a Palearctic hoverfly.

Description

For terms see Morphology of Diptera
The upper margin of the facial tubercle is smooth. The eyes have short black hairs. The post-alar calli and the margin of the scutellum have only short bristles. The normal length wings are usually hyaline. The wing length is 4 ·5-6·75 mm.,body length is 5.0 to 7.0mm.A very variable species. See references for determination.[1][2][3][4] [5]

Distribution

Scandinavia south to the Iberian Peninsula and from Ireland eastwards through central and southern Europe to Turkey', European parts of Russia, Russian Far East and Siberia. [6][7]

Habitat

Very varied. Forest, pasture, montane grassland, alpine grassland, fen and dune systems.

Biology

Low-flying, over ground vegetation; males hover at 1-3m, in small clearings. Flowers visited include Caltha, Cirsium arvense, Leontodon, Leucanthemum, Menyanthes, Prunus spinosa, Ranunculus, Salix, Senecio, Taraxacum. Flies April to October The larva feedsin the stems of Achillea, Matricaria and Sonchus oleraceus and in the involucre of Tragopogon [8]

References

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. ISBN 81-205-0080-6.
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
Stubbs, Alan E. & Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide (2nd (revised) ed.). British Entomological & Natural History Society. p. 271, xvpp. ISBN 0-9502891-3-2.
Fauna Europaea
Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)" (PDF). Syrph the Net, the database of European Syrphidae. 65: 285pp.

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[1] 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. ISBN 81-205-0080-6.

[2] Van Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.addendum

[3] 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.

[4] Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf

[5] Stubbs, Alan E. & Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide (2nd (revised) ed.). British Entomological & Natural History Society. p. 271, xvpp. ISBN 0-9502891-3-2.

[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.

[Speight-8] Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)" (PDF). Syrph the Net, the database of European Syrphidae. 65: 285pp.