. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 218 Orthorrhapha brachycera. indistinct, lighter stripes in the middle, abbreviated behind, the median the lightest. On the disc there are five long, black dorsocentral bristles, but no acrostichal bristles. Further a small humeral bristle, a posthumeral, a notopleural and a postalar bristle, all black, but there is no supraalar bristle. Scutellum with two black marginal bristles. Pleura slate-grey, metapleura with fine, pale hairs. Abdomen olive-brown above, in certain directions with an almost reddish reflex; t
. Diptera Danica: genera and species of flies hitherto found in Denmark. Diptera. 218 Orthorrhapha brachycera. indistinct, lighter stripes in the middle, abbreviated behind, the median the lightest. On the disc there are five long, black dorsocentral bristles, but no acrostichal bristles. Further a small humeral bristle, a posthumeral, a notopleural and a postalar bristle, all black, but there is no supraalar bristle. Scutellum with two black marginal bristles. Pleura slate-grey, metapleura with fine, pale hairs. Abdomen olive-brown above, in certain directions with an almost reddish reflex; the sides together with the venter slate-grey; it is sparingly clothed with very short, pale hairs, only longer on the first segment. The two pairs of genital lamellse somewhat narrow, straight, the lower grey, the upper longer, shining black. Penis brown, thin, curved at the apex. Legs black; coxae greyish pruinose. The legs have Fig. 89. Wing of CI nigra. pale hairs, towards the end of the hind tibiEe they are a little longer; below the front femora there are two rows of very short, chiefly black, spine-like bristles. Wings somewhat blackish tinged. Veins black; costa only with fine hairs. Halteres black. Female. Quite similar to the male except the differences in the exterior genitalia; front femora without bristles. Length 3,4—4 mm. CI. nigra has first been known as belonging to our fauna in this year (1910), when I caught it at Hald near Viborg in Jutland, on 2^6 and ^^/o; it was present in great numbers at a saw-mill, sitting on a boarding constantly washed by water; it was taken several times in copula. Geographical distribution: — Europe down into France; its northern limit seems to he in Denmark. n. Subg. Heleodromia Hal. Wings more or less spotted on account of a seaming of the cross-veins. No stigma. The discal cell not long, truncate at the apex; anal vein long, nearly reaching the margin. Glypeus not separated from the epistoma, with the margin straight.
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
