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Hexomyza schineri (Giraud, 1861) [Diptera: Agromyzidae] Sallow stem galler Agromyza schineri Giraud, 1861. Verh. zool.-bot. Ges. Wien 11: 484. Agromyza schineri Giraud, 1861; Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 162. Hexomyza schineri (Giraud, 1861); Spencer, 1966. Beitr. Ent. 16: 42. Hexomyza schineri (Giraud, 1861); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 14 (figs 11-13), 15, 118-120. Hexomyza schineri (Giraud, 1861); Spencer, 1976. Fauna ent. Scand. 5(1): 37, figs 11-14. Hexomyza schineri (Giraud, 1861); Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 80 (fig. 295), 81, 93.

Gall: An oval twig gall up to 10 mm long (Redfern et al, 2002: 387, fig 588), sometimes several arranged spirally around twig each containing one larva. Larva: Details unknown. Puparium: Yellowish grey to brown (Redfern et al, 2002: 387, fig 589); posterior spiracles on short stalks, each with three minute bulbs (Spencer, 1972b: 14 (fig. 13), 15). Hosts in Britain: Salicaceae       Populus nigra Black-poplar Robbins, 1983: 24 Populus nigra Black-poplar Spencer, 1972b: 119 Populus tremula Aspen Spencer, 1972b: 120 Hosts elsewhere: Salicaceae       Populus spp.   Spencer, 1990: 81 Populus tremuloides American Aspen Spencer, 1990: 81 Time of year - galls: May-June. Time of year - adults: Unknown. Distribution in Britain: Herts (Hoddesdon) (Spencer, 1972b: 15), Warwick (Coventry) (Robbins, 1983: 23) and Surrey (NBN Gateway distribution map - NE). Distribution elsewhere: Holarctic. Widespread in Europe including Austria, Germany, France, Spain (Spencer, 1976: 37), Belgium, Italian mainland and Poland (Martinez in Fauna Europaea). Also recorded in Canada from New Brunswick to British Columbia (Spencer, 1969a: 81) and in the U.S.A. from Washington State to New Mexico (Spencer, 1990: 81). Parasitoids: Unknown. Adults: The adults, including the halteres, are uniformly black, as in other British species of Hexomyza.

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Last updated 05-Aug-2008  Brian Pitkin