﻿On the Bombyliid Fauna of Sonfh Africa (Diptera). 103 



about the interpretation of tlie *S'. macUenfns of Wiedemaun. This 

 species is iudeed figured by its author as having only 2 marginal cells, 

 while the type at Berlin is said to have 3 of these cells ; it seems that 

 Macquart, Loew and Schiner have all comprised different species 

 tinder the same name. I give here the following table of the known 

 South African species, to clear up the position of the new species, and 

 considering all the species as different, according to the characters 

 given by the authors : 



1 (10). Three submarginal cells present. 



2 (9). The cross-vein forming the third submarginal cell unites the upper 



branch of the culiital fork with the second longitudinal vein. 



3 (4). Eyes of the female narrowly separated; wings broadly yellow at 



base and at fore border .... marshalli, Bezzi. 



4 (3). Eyes of the female touching as ixsual ; wings not yellow. 



5 (8). Front coxae yellow, and moreover there is a yellow stripe above them 



on the prothorax ; first posterior cell distinctly narrowed at end. 



6 (7). Abdominal stalk black above ; wings rather infuscated. 



leptogaster, Loew. 



7 (6). Abdominal stalk entirely reddish-brown ; wings more clear. 



clavatus, Karsch. 



8 (5). Front coxae red ; no yellow prothoracical stripe ; first posterior cell 



not at all nari'owed at end . . . sanguineiis, sp. no v. 



9 (2). The above-named cross-vein is placed before the cubital fork, imiting 



its stalk with the second longitvidinal vein. 



macilentus, Schin. (nee Wied.). 



10 (1). Two siibmarginal cells only present. 



11 (14). Eyes narrowly sepai-ated, or only approaching above near the ocelli. 



12 (13). Wings wholly infuscated .... macilentus, Wied. 



13 (12). Wings with a sharply defined dark fore border . crudelis, Westw. 



14 (11). Eyes touching for a long line. 



15 (16). No yellow spot above the front coxae. 



miobrochus, Speis., macilentus, Macq. (nee Wied). 



16 (15). A yellow spot above the front coxae . . . snowi. Ad. 



Systropus leptogaster, Loew (1860). 

 A typical male specimen from Durban, April, 1913 (W. Hay garth). 



Systropus sanguineus, sp. nov. 



A middle-sized species of Ammopliilus facies, distinguished by the 

 prevailing red colour of body and legs. 



Type ^ from Stellenbosch, November, 1887 (L. Pcriuguey), and 

 an additional specimen of same sex from O'Okiep. I think that the 

 present species may be the macilentus-type of Berlin, which is 

 described by Karsch and by Speiser, in spite of Wiedemann's figure, 

 as having 3 submarginal cells. 



