Empididae. 115 



with three slightly conspicuous, somewhat darker and a little shining, 

 narrow stripes. The dorsocentral and acrostichal bristles somewhat 

 long, black, biserial, the hinder dorsocentral bristles longer and uni- 

 serial. Further a humeral bristle, a posthumeral, three notopleural, 

 a couple of supraalar and a postalar bristle, all black and somewhat 

 strong; but besides there are some rather strong hairs especially just 

 behind the transverse furrow, and some inwards to the humeri. 

 Scutellum with four black marginal hristles. Pleura grey, metapleura 

 with black bristles. Abdomen grey, somewhat densely clothed with 

 not long, whitish or yellowish hairs; venter similarly coloured and 

 haired, Exterior genitalia not large, the seventh dorsal segment has 

 some excisions in the hind margin, the eighth is flat, somewhat im- 

 pressed above and here black and shining; it has a process at each 

 side, which is either tubercle-shaped , or hook-shaped and curved 

 backwards, according to the direction in which it is seen and to the 

 degree to which the genitalia are contracted; the lower lamellæ are 

 directed more or less upwards, they are somewhat broad, the hinder 

 lower angle a little pointed; the upper lamellæ are small, generally 

 quite hidden. Penis is thick, somewhat compressed, curved upwards 

 and a little dilated at the apex; there is a small, triangular ventral 

 lamella. All the hairs on the genitalia are black. Legs black; coxæ 

 greyish pruinose; the hind metatarsi slightly thickened, and also the 

 front metatarsi thicker than the middle ones. Front femora short- 

 haired; middle femora densely haired above, with some longer hairs 

 at the base, below with bristles on the basal half and short hairs on 

 the apical half, the bristles at the base are dense, almost forming a 

 tuft; hind femora short-haired above, with bristles on the anlerior 

 side and long, fme hairs on the posterior side, decreasing in length 

 towards the apex; on the ventral side there are longer and shorter 

 bristles; front tibiæ with bristly hairs on the dorsal side and a short, 

 dense pubescence ventrally and on the posterior side; middle tibiæ 

 with bristles above and below, those above long and present in a 

 number of four to five, besides with a short, dense pubescence on 

 the anterior side; hind tibiæ with short hairs below and bristles 

 above; tarsi short-haired; only the hind metatarsi somewhat spinulous 

 beneath, but with no long hairs above; the tarsal joints with bristles 

 at the apex which are somewhat long on the anterior tarsi ; the dense 

 pubescence on the front and middle tibiæ is continued out on the 

 tarsi. The hairs and bristles are black or brownish black, the dense 

 pubescence on the anterior legs pale. Wings hyaline, somewhat milky; 

 the anterior veins brown or black, the others pale brown or yellowish, 

 thin. Stigma faint, yellowish. Balteres whitish or pale yellow. 



