Didea alneti

Didea alneti is a Holarctic species of hoverfly.[1][2][3]

Didea alneti
Didea alneti in Europäischen Zweiflügeligen (figure 5)
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Family:
Syrphidae
Genus:
Didea
Species:
D. alneti
Binomial name
Didea alneti
Fallén, 1817

Description

External images For terms see Morphology of Diptera

The wing length is 9 ·75-11·5 mm.

The face mostly yellow. Halteres with at least knob black or dark brown. Male vertex not long, less narrow than in Didea fasciata. Tergite 5 black, rarely with spots. Male tergite 4 with front edge of wedge-shaped bars clearly separated from the front margin of the tergite or just touching front of tergite on median line. [4] [5][6] The male genitalia and the larva are figured by Dusek and Laska (1967) .[7]

Distribution

A Palearctic species with a wide distribution in Europe and East across Russia to the Pacific coast, Mongolia, Japan and Korea. [8][9] in North America from Alaska south to Colorado.[10]

Biology

Habitat forest; conifer forest and taiga, Quercus woodland.[11] Arboreal, descending to visit flowers of white umbellifers, yellow composites, Cirsium, Plantago, Potentilla, Rosa, Rubus idaeus, Salix, Sambucus ebulus, Valeriana officinalis, Viburnum opulus.[12] The flight period is mid May to early September. The larva is arboreal and feeds on aphids associated with Larix, Prunus, Salix and Quercus.

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gollark: Well, you seem to be using it as a justification to allow/not allow things.
gollark: Also, I don't think stuff is *generally* regulated based on summing up long term expected happiness change or something? Perhaps it should be, but it's very hard to calculate and runs into problems, and (in my opinion as a libertarian-leaning person) leads to stuff which is "out of scope" of government actions.
gollark: You're stereotyping in some vaguely rude way with ~0 empirical data to back it up.

References
  1. Stubbs, Alan E.; Falk, Steven J (1983). British Hoverflies: An Illustrated Identification Guide (2nd ed.). London: British Entomological and Natural History Society. pp. 253, xvpp. ISBN 1-899935-03-7.
  2. Ball, S.G.; Morris, R.K.A. (2000). Provisional atlas of British hoverflies (Diptera, Syrphidae). Monks Wood, UK: Biological Record Centre. pp. 167 pages. ISBN 1-870393-54-6.
  3. Van Veen, M.P. (2004). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae (Hardback). Utrecht: KNNV Publishing. p. 254. ISBN 90-5011-199-8.
  4. 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.
  5. Bei-Bienko, G.Y. & Steyskal, G.C. (1988) 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.
  6. Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf
  7. Dusek, J. & Laska, P. (1967) Versuch zum aufbau eines Naturlichen Systems mitteleuropaischer Arten der Unterfamilie Syrphinae (Diptera). Acta sc.nat.Brno, 1: 349-390.
  8. Fauna Europaea
  9. Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
  10. Vockeroth, J. R. (1992). The Flower Flies of the Subfamily Syrphinae of Canada, Alaska, and Greenland (Diptera: Syrphidae). Part 18. The Insects and Arachnids of Canada. Ottawa, Ontario: Canadian Government Pub Centre. pp. 1–456.
  11. Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)" (PDF). Syrph the Net, the database of European Syrphidae. 65: 285pp.
  12. de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167.


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