Anasimyia transfuga is a Palearctic species of hoverfly.
Description External images For terms see Morphology of Diptera The wing length 6-8·25 mm. Dark ground colour with steeply inclined hooked markings (the inner limb is strongly oblique). Very similar to A. contracta, but transfuga has the lateral margins of tergite 2 less concave than in contracta. There are also differences in the grey dusting of the sternites (sternites 2 and 3 are completely grey dusted in the male of transfuga).Speight, M. C. D., 1981. The Irish Anasimyia species including a key and first records of A. contracta (Diptera: Syrphidae). Ir. Nat. J., 20: 229- 234.
Keys and accounts Coe R.L. (1953) SyrphidaeCoe, R.L. (1953) Diptera: Syrphidae. Handbks. ident. Br. insects, 10(1): 1-98. R.ent.Soc.London.pdf Van Veen, M. (2004) Hoverflies of Northwest EuropeVan Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht. Van der Goot, V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de BeneluxVan 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. Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to USSR insects. DipteraBei-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. .
Habits A wetland species found on tall emergent pond side vegetation, margins of mesotrophic pools and lakes with Scirpus or Sparganium. Flowers visited include Caltha palustris, Ranunculus repens, white umbellifers, Sonchus arvensis, Sorbus aucuparia and Taraxacum. Flies early May to July. The larva is aquatic and microphagous in rotting plant debris.de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167. Flies April to October.
Distribution A Palearctic species with a wide distribution in EuropeFauna Europaea East to Siberia.Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
References
External links Biolib