. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. Aphiochaeta. 341 equal, the upper less distant than the inner bristles of middle row, the lower a little more approximate. Antennae small, black, arista somewhat long, distinctly pubescent. Palpi black or dark brown, not small and with the bristles well developed. Thorax black, some- what shining, with brown pubescence. Mesopleura bare. Abdomen robust, black and dull, the hairs very inconspicuous, only visible at the sides and at apex. Hypopygium quite small and withdrawn, but it has small hairs below; anal tube
. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. Aphiochaeta. 341 equal, the upper less distant than the inner bristles of middle row, the lower a little more approximate. Antennae small, black, arista somewhat long, distinctly pubescent. Palpi black or dark brown, not small and with the bristles well developed. Thorax black, some- what shining, with brown pubescence. Mesopleura bare. Abdomen robust, black and dull, the hairs very inconspicuous, only visible at the sides and at apex. Hypopygium quite small and withdrawn, but it has small hairs below; anal tube very short, almost not pro- truding, yellowish. Legs black, the front legs more brown with the coxae yellow; hind femora somewhat dilated, the hairs below short;. Fig. 103. Wing of A. glabrifrons (^. hind tibial bristles distinct and not small, that is to say only the four or five on the middle part, towards both ends they are small; the dorsal hair-seam somewhat suddenly deflected anteriorly from the middle. Wings very strongly brown and often with a cloud behind the middle, veins brown and strong; costa reaching to the middle or beyond, it is a little thickened in the first division, though this thickening is not much pronounced, 1 slightly longer than 2 and about equal to 2 -f 3; costal cilia short; fourth vein issues anterior to the fork with a sort of peduncle, for the rest it is evenly curved, the curve strongest on the middle. Halteres black. Female. Similar to the male; palpi sometimes paler to yellovsish; the costa not thickened and the basal stalk of fourth vein less or sometimes almost not at all pronounced. Length 1,5—1,7 mm. Wood terms the hind tibial bristles weak and he even speaks (1. c. 62) of practically bare hind tibiae; in my specimens the bristles on the middle part of hind tibiae are fairly developed. A. glabrifrons is not common in Denmark; Ermelund, Geel Skov, Lohals on Langeland and in Jutland at Ry (the author); the dates are ^Vs—^^9 in 1918 to 192
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
