﻿102 Annals of the South African Miixe»)n. 



the vertex ; eyes of typical form, but not much uarro^ved above, 

 touching for a space longer than the ocellar tubercle ; frontal triangle 

 much narrower, longer than broad, of a dai'k grey colour; face narrow, 

 not prominent, quite bare, even the genae being furnished with vei'v 

 scarce, whitish hairs like those of the lower part of head. Antennae 

 long and thin ; first joint thin, very scarcely pilose, entii*ely reddish- 

 yellow ; second joint globular, reddish-yellow ; third joint elongate, 

 linear, gradually tapering to a point, entirely black. Proboscis 

 black. Thorax and scutellum entirely black, but as it seems, they are 

 entirely clothed with dark grey dust and with whitish hairs. 

 Squamulae and haltères dirty whitish, the latter with an entirely 

 yellowish knob. Abdomen with the sides and the venter entirely 

 reddish, but the middle of the back black, grey-dusted, with the hind 

 border of the segments reddish ; it seems to l)e dusted and hairy like 

 the back of mesonotum ; end of abdomen and genitalia entirely 

 reddish. Legs and coxae entirely yellowish, only the last 4 tarsal 

 joints being black ; they are clothed with whitish scales on femora, and 

 with scarce whitish hairs. Wings quite hyaline, iridescent, with a 

 pale yellowish stigma ; the veins are yellowish at base, dark in middle 

 and at end, and show no trace of fuscous margination. Cubital fork 

 2\ times as long as broad at end, obtuse at base, its upper branch 

 originating at a right angle a little beyond the vipper end of the apical 

 cross-vein of the discoidal cell, and rounded at base ; middle cross- 

 vein placed beyond the middle of the discoidal cell ; discoidal cell 

 long and narrow, its terminal vein deeply S-shaped Itut not much 

 oblique ; apical stalk of the anal cell short. 



APOLYSIS, Loew (1860). 



A very distinct genus, Avell described and figured by Loew in his 

 great work, 



Apolysis humilis, Loew (1860). 



A very small fly, at once distinguished by its generic characters. 

 Originally described from Caffraria and the Cape. There are in the 

 collection some specimens from Cape Town (L. Pi'ringuey). 



Subfamily SYSTROPINAE. 



SYSTEOPUS, Wiedemann. 



This important genus is represented by 3 species, one of which is 

 described here as new. There are rather numerous South African 

 species described ; but some confusion has arisen between them, chieflv 



