. Empididae. 157 at the hind margin of the segments. Venter grey, short-hah-ed. Exterior genitalia somewhat large, compressed; the lamellse somewhat long- pointed. Legs black; coxae greyish pruinose. Front femora with fine hairs above and below, and on the posterior side; middle femora with bristles on the anterior side; hind femora with fine hairs, and with bristly hairs on the antero- ventral side, which latter are long towards the apex; front tibiae with fine hairs and some longer, bristly hairs above, longest at the apex; middle tibiae with bristles on the various sides; hind tibiae ciliat
. Empididae. 157 at the hind margin of the segments. Venter grey, short-hah-ed. Exterior genitalia somewhat large, compressed; the lamellse somewhat long- pointed. Legs black; coxae greyish pruinose. Front femora with fine hairs above and below, and on the posterior side; middle femora with bristles on the anterior side; hind femora with fine hairs, and with bristly hairs on the antero- ventral side, which latter are long towards the apex; front tibiae with fine hairs and some longer, bristly hairs above, longest at the apex; middle tibiae with bristles on the various sides; hind tibiae ciliated and with bristles on the dorsal and anterior side. Front metatarsi thickened, some- what thicker than tibiae; they are short-haired, longest above, and a little longer towards the apex, below they have some distantly placed, longer, very fine hairs; they are about three fourths of the tibiae in length and nearly as long as the four following joints, which are longer than broad; the whole tarsus is longer than tibiae. The hairs H. ni- and bristles black or blackish. Wings somewhat blackish ffi'^^ajront tinged. Veins blackish; the upper branch of the cubital '^^ vein not much diverging; anal vein continued to the margin. Stigma blackish brown. Halteres black. Female. Similar to the male; the thoracic bristles about of the same length or slightly shorter. Front metatarsi simple, scarcely half as long as the tibiae and as long as the three following joints; hind tibiae with the basal third part thin, then strongly dilated, compressed and curved, and again a little narrowed towards the apex. Length 3,5 towards 4 mm. This species resembles quadrifaria, but it has a blacker and a little more shining thorax, longer thoracic bristles and darker wings with a complete anal vein; the female is easily known by the shape of the hind tibiae. H. nigrina seems not to be common in Denmark; Ordrup Mose (Staeger), and in Jutland at Hald near Viborg (the author); the dates are -^/g—^'^
Size: 1212px × 4126px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
