. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Enipididae. 301 11. T. pallidiventris Meig. 1822. Meig. Syst. Beschr. 111, 82, 35. — 1842. Zett. Dipt. Scand. I, 277, 6. — 1862. Schin. F. A. I, 88 {Flatijpalpus). — 1903. Kat. palåarkt. Dipt. 11, 287. — Tachijdromia longiseta: 1842. Zett. Dipt. Scand. I, 278,7. Male. Frons and vertex grey; epistoina white; palpi not large, yellow. Oeciput grey, with yellow bristles above, white hairs below. Antennæ black or brown, the basal joints yellow, the third joint somewhat elongated, about as long as the arist
. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Enipididae. 301 11. T. pallidiventris Meig. 1822. Meig. Syst. Beschr. 111, 82, 35. — 1842. Zett. Dipt. Scand. I, 277, 6. — 1862. Schin. F. A. I, 88 {Flatijpalpus). — 1903. Kat. palåarkt. Dipt. 11, 287. — Tachijdromia longiseta: 1842. Zett. Dipt. Scand. I, 278,7. Male. Frons and vertex grey; epistoina white; palpi not large, yellow. Oeciput grey, with yellow bristles above, white hairs below. Antennæ black or brown, the basal joints yellow, the third joint somewhat elongated, about as long as the arista or a little shorter. Thorax yellowish pruinose; all bristles yellow; the short hairs in front distinct and obvious. Scutellum with two yellow marginal bristles, and a small hair on each side. Pleura grey pruinose, a little yellowish upwards; above the middle coxæ a black, polished spot. Abdomen black, shining, the two flrst segments with grey bands at the sides; it is clothed with short, yellowish hairs. Venter blackish or paler to yellow, especially towards the base. The exterior genitalia somewhat large. Legs yellow, the tarsi blackish or brownish annulated, the last joint generally deep black for the largest part. The front femora somewhat, the middle femora considerably thickened. The legs are yellow haired, front and hind tibiæ with some small bristles on the dorsal side, these bristles may be darker. Wings hyaline or a little yellowish. The veins yellow, a little darker towards the apex, the cubital and discai vein some- what convergent. Balteres whitish yellow. Female. Similar to the male; the venter sometimes more distinctly pale. Length 2,5 to about 3,-5 mm. ^'^'l^''- ,^^;!^=-Pf^.^ "^' The species is very similar to bicolor; I find it distinguished by the distinctly longer third antennal joint, the thicker anterior femora, and the distinctly annulated tarsi; the cubital and discai vein are as a rule more convergent, especially the cubital vein is gen
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