. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. oO Oithonhapha brachycera. yellow with a blackish ring in the middle; tarsi yellow, darkened towards the ends. Femora with long, chiefly brownish hairs, tibiae short haired. Wings hyaline with blackish veins, cubital vein forked, the first of the veins, rising from the discal cell, very indistinct, the third wanting. Halteres yellow with brown peduncle. Female. Eyes very sparingly and short hairy, with a bluish band a little above the middle. Front and face black, greyish haired, the hairs forming a small spot on
. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. oO Oithonhapha brachycera. yellow with a blackish ring in the middle; tarsi yellow, darkened towards the ends. Femora with long, chiefly brownish hairs, tibiae short haired. Wings hyaline with blackish veins, cubital vein forked, the first of the veins, rising from the discal cell, very indistinct, the third wanting. Halteres yellow with brown peduncle. Female. Eyes very sparingly and short hairy, with a bluish band a little above the middle. Front and face black, greyish haired, the hairs forming a small spot on each side at the eye-margin behind the antennae just in front of a pair of sligthly elevated, shining tubercles;. Fig, 18. Wing of 0. tigrina. front with an impressed middle line; hinder eye-margin with white, shining pubescence. Thorax on the disc with short, depressed, greyish white shining pubescence. Pubescence on abdomen greyish. Length 7,5—10,5 mm. The larva is lighter or darker brown, sometimes almost black, with some, often indistinct, longitudinally arranged darker markings; it is rather densely, short haired on both surfaces; it has forwards curved spines on the hind margin of the ventral side of the seventh abdominal segment. When full grown its length is about 16 mm. 0. tigrina is common in Denmark in localities near water, where it occurs in rushes and low herbage; Damhusmosen, Utterslev Mose. Vangede Mose at Gentofte, Ermelund, Dyrehaven, Ruderhegn, Fures0, Lillerod, Hillerod, at Frederikssund and Roskilde; LoUand in Norreskov at Maribo and at Ryde, and Funen at Assens. It is an early species, )ny dates are ^**'5—^^/- '|^|^g larvae and pupae have been taken in water and flood refuse in Damhusmosen, Utterslev Mose, Fures0 and several other localities on ^'^U—2^5, they developed to ^"^«. Geographical distribution: — Common in the northern and middle Europe from middle Sweden down into France. 2. O. argentata Fabr. 1794. Stratiomijs, Fabr. Ent. Syst. I
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
