﻿On the Bomln/Ilid Fatma of South Africa {Di2)tera). 81 



abdomen being much narrower than the thorax. Head shining black, 

 but the anterior half or even most of the frons and the whole face ai'e 

 of a pale yellow colour. Occiput with a faint pale dust on sides at 

 the borders, and with short and scarce pale hairs ; vertical crest 

 formed by whitish hairs only. Ocellar tubercle very prominent, 

 whitish-haired. Frons of the male a little broader than the ocellar 

 tubercle, but becoming much broader in front, being inflated and 

 measuring in front of the antennae more than four-sixths of the breadth 

 of the head ; the middle furrow is narrow but well developed, reaching 

 the base of the antennae ; the hairs are black on the part not clothed by 

 the facial brush and whitish on the rest ; the eyes have the ai'eolets of 

 the upper half a little broader but not sharply separated from the 

 lower ones. Frons of the female gently rounded, inflated, three times 

 as broad at the vertex as that of the male, measuring | of the 

 breadth of the head ; the division of the black from the yellow 

 part is formed by a straight line placed nearly at half the distance 

 between the vertex and the base of the antennae ; the middle furrow 

 is not distinct ; it is clothed with black hairs on the black part and 

 with whitish ones on the yellow j^art, but as the frons merges gradually 

 into the face and into the cheeks, there is no distinct brush, the face 

 being entirely yellow and very short. The face is clothed with entirely 

 whitish hairs, like the cheeks and their sides, which are exceedingly^ 

 broad and partly black haired. In the male the face is also yellow, 

 but has a very well-developed circular brush, which is formed by white 

 hairs and surrounded by black ones. Antennae with the first joint 

 short and inflated, almost spheroidal, of a dark, reddish yellow colour, 

 with long and scarce, rigid black hairs ; second joint very small, 

 perfectly globular, reddish yellow, black above ; third joint entirely 

 black, thin and filiform for more than the basal half, and subsequently 

 dilated to an ovate spatule, which is narrowed at end. Mouth-opening 

 proportionally small and narrow ; proboscis very short, its end usually 

 not projecting beyond the end of the antennae, and measuring only 

 1-1 "5 mm. in length ; palpi long, white-haired. Thorax, scutellum 

 and abdomen black ; in the male they are less shining, and entirely 

 clothed with rather long but not dense, equal, pale yellowish hairs ; 

 in the female they are much more shining, with a very short, and on 

 the abdomen very sparse, pale yellowish pubescence. Pleurae almost 

 bare, with hairs on the mesopleura only, which are whitish in the 

 female and partly black in the male. Haltères with a pale yellowish 

 or whitish knob, which bears a black spot on the upper side in the 

 male. Squamae whitish hyaline, with a yellow border and a very 

 short pale fringe which is nearly wanting in the female. Legs 

 6 



