. Fig. 50. Hypopygium of H. brevicornis, ven- tral lobe, lateral and median inner lamellæ and outer lamellæ are seen. 2. Subg. Gymnoptemus. Gubital and discai veins not or slightly converging. The antennal arista somewhat distinctly haired (in angustifrons, assimilis and aerosus rather short-haired). Scutellum distinctly hairy above, in chalyheus only slightly; it has two strong marginal bristles, but only in chalyheus there is besides a small hair at each side, the other species have none. The front tibiæ have no ven tral bristles, only in chalyheus there is a posterior bristle. Hind metatars
. Fig. 50. Hypopygium of H. brevicornis, ven- tral lobe, lateral and median inner lamellæ and outer lamellæ are seen. 2. Subg. Gymnoptemus. Gubital and discai veins not or slightly converging. The antennal arista somewhat distinctly haired (in angustifrons, assimilis and aerosus rather short-haired). Scutellum distinctly hairy above, in chalyheus only slightly; it has two strong marginal bristles, but only in chalyheus there is besides a small hair at each side, the other species have none. The front tibiæ have no ven tral bristles, only in chalyheus there is a posterior bristle. Hind metatarsus much shorter than the second joint, in chalyheus only slightly shorter. The hypopygium of the male is alike in all species (Fig, 50); it is more or less long, on the ventral side there is about in the middle, or at all events long before the apex, a pair of lobes of characteristic shape; they are long and slender, directed backwards with the end curved upwards, and with some hairs; of the inner lamellæ the lateral are short, flat and of a characteristic shape, the ventral apical corner pointed and the dorsal corner going out into a spine; the space between the edges is thin and transparent; the median inner lamellæ are more styliform, but a little dilated; the sheath of penis reaches to the end of the hypopygium; in chalyheus the ventral lobes issue more back- wards and are shorter, and the inner lamellæ are longer. The outer lamellæ are small, somewhat roundish, the marginal hairs not long; in chalyheus they are larger, with longer hairs. Table of Species. 1. Femora mainly black 2. — Femora yellow 3.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
