﻿On the Bnml>i/lil(f Fauna of Honf/i Africa (Dq>fera). Vi 



time he wrote his work on the Diptera of South Africa; only in 1H():> 

 (lid he clesci'ibe some species belonging to this group. 



They are characterised by the vuiited eyes of the male, spinose hind 

 femora, small basal comb and absence of bristles in front of the thorax ; 

 the hairs of the body are mostly or entirely yellow, and there are no 

 silvery spots on the body ; only very rarely are these spots present on 

 the head alone. 



Of the following species, only the first is different in many 

 respects from the others, and, together with the two other species 

 mentioned for comparison, forms a group allied to the Mediterranean 

 B. mibilus. All the remaining species are very homogeneous, and 

 constitute a peculiar group very characteristic of the South African 

 fauna. 



They may be tabulated as follows : 



1 (6). Occipital hairs short; ixpi^er branch of the third longitudinal vein 



straig-ht at base and in its whole length parallel with the costa or 

 rarely very little retreating, the second marginal cell therefore as 

 broad at base* as at apex; antennae at base black-haired; probo.scis 

 entirely black ; scutellnm entirely black ; legs always with l)lack 

 spines ; discal cross-vein before the middle of the discoidal cell ; wings 

 infuscated at base and with a black coml». 



2 (3). First posterior cell not acute at end; upper branch of the third 



longitudinal vein a little retreating at base, and usiially provided 

 there with a short stump ; antennae and palpi entire black. 



neitJujcris, Jaenn. 



3 (2). First posterior cell rather acute at end ; upper branch at base not 



retreating and not appendiculated. 



4 (5). Face of the male clothed with black hairs; abdomen at end with a 



broad tuft of white hairs ; antennae and palpi red, the third antennal 

 joint bright red ..... erythrocervs, Bezzi. 



.J (4). Face of the male with dense yellow hairs; abdomen at end not 

 broadly white-haired ; antennae and palpi black. mollis, sp. nov. 



(■) (1). Occipital hairs long and dense, but withoiit longer black bristles; 

 upper branch of third longitiidinal vein nuxch retreating at base, 

 and therefore the second submarginal cell is twice as broad at base as 

 at end ; antennae with pale hairs at base, and usually with red basal 

 joints ; proboscis often red— at least in part : sciitellum usually red 

 legs Avith yellow spines ; wings not infuscated at base, f>r only rarely 

 pale yellowish, and with a yellow comb. 



7 (12). Proboscis entirely red with a black end, or at least red on upper 



side ; third antennal joint usually reddish ; discal cross-vein placed 

 much before the middle of the discoidal cell. 



8 (11). Scutellum red; frons of female very broad; hairs of body of a 



moderate length ; wings broadly reddish yellow at base ; species of 

 large size. 

 * The base is that on the third vein, the end is that at the costa. 



