﻿On the BomhyUkl Fauna of South Africa (Diptera). 47 



S (11). Wiiiijs infuscate or dimidiate, with a black basal comb of usual size ; 

 face even in the male with distinct bristles ; antennae entirely black. 



9 (10). Head and thorax with numerous black bristles; eyes of the male 

 Ijroadly separated, -with small areolets ; palpi black ; wings infuscated 

 basally ...... erinaceus, sp. nov. 



10 (9). Head and thorax with yellow bristles; eyes of the male very approxi- 



mate and with enlarged areolets above ; wings of the male dimidiate. 



'tnacropJithahnus, Bezzi. 



11 (8). AVings hyaline, with a small and whitish basal comb; face of the 



male without bristles, and eyes in the same sex rather separated ; 

 antennae of the male entirely black, with yellow base in the female. 



iwnocuus, sp. nov. 



12 (1). Body wholly clothed with a long, silvery pubescence and without 



distinct bristles even on the abdomen; scutellum entirely black; 

 wings hyaline, with a very small and silvery basal comb. 



levxosoma, sp. nov. 



Anastoechus rubricosus, Wiedemann (1821). 



A veiy characteristic species, distinct from any other on account of 

 its strong peristomial comb and of tlie very peculiar wing pattern. 



Some specimens of both sexes from Namaqualand, Springbok, 

 November, 1890 (R. M. Lightfoot) ; O'Okiep, October, 1885 (L. 

 Pcringuey) ; Bushmanland, Jackal's Water, Namaqualand (Cape), 

 October, 1911 (R. M. Lightfoot). One specimen was already recognised 

 by Bigot as belonging to the present species. 



This species was not recorded since Wiedemann's description. It is 

 very variable in size, measuring in length 9-lo mm., but one female 

 is only 6 mm. The second antennal joint is red like the first ; the 

 attenuated part of the third joint is very long and thin. The frons 

 is without black hairs — in opposition to Wiedemann's statement (Stirne 

 schwarz behaart) ; the bristles on the face are of the same colour as 

 the fur, but they are always distinguishable, and those of the genae 

 ai*e very distinct, numerous and free. Eyes of the male broadly 

 separated, their distance being about twice as broad as the base of the 

 ocellar triangle ; areolets of equal size. Proboscis rather short, black, 

 but the labium is usually red at the extreme base below ; palpi yelloAv. 

 Thorax with long hairs and with no black ones ; those on pleurae and 

 breast are whitish ; scutellum red ; all the bristles are of the same 

 colour as the fur. Abdominal fur very long and tuft-like ; the 

 numerous bristles are longer than the hairs, disposed in complete 

 rows, and are pale at base and dark brown at end. Venter yellow, 

 with pale pubescence and short yellow bristles along the middle ; anal 

 tuft of the female very conspicuous, yellow ; male genitalia hidden 

 within the dense apical tuft. Legs with only the apical part of the 



