﻿Ou thr TiintiJnjJiul Faiuht »/ Soiif/i Afrlni ( Di /if>T(t). 121 



base there is a narrow reddisli-yellow stripe ; venter recldish, whitish - 

 haii'ed ; nulle genitalia of great size, Ijilobate, l)Iaclv aliove, red below, 

 with yellow hairs. Legs entirely ])ale yellow, white-scaled ; femora 

 and tarsi nioi'e or less darkened at end ; hairs of coxae and of the 

 under side of femora white ; the thin spines of the hind femora and 

 the short spicules of the tibiae are black ; claws black, pulvilli whitish. 

 Wings very long, with pedunculate base ; the costa is not ciliated at 

 base and the alula is very rudimentary ; they are entirely and equally 

 inf uscated, the axillary lobe only being hyaline with a dark end. The 

 hyaline stripes are placed on the end of the first and of the second 

 submarginal cells, this last being in contact with the whole wing 

 border between the ends of the two branches of the cubital fork, in 

 the middle of the 2ud, ord and 4th posterior cells, and one l>roader 

 than the others, of ovate shape, in the last half of the discoidal cell ; 

 in addition there is the usual whitish spot on the upper exterior angle 

 of the second basal cell. The veins are black ; the second longitudinal 

 is suddenly and deeply looped liefore the end, and its origin is 

 ecjuidistant from the base of the third vein and the discal cross-vein ; 

 upper branch of cubital fork gently rounded at base and destitute of 

 stump. First posterior cell long, not, or little narrowed at end ; discal 

 cross- vein placed on the first third of the discoidal cell ; this last cell 

 is long, very dilated in its last half, and therefore much consi.ricted 

 Ijefore the middle ; third posterior cell very elongate and very narrowed 

 in its last half ; anal cell narrowed at end ; ambient vein complete. 



Petrokossia fulvipes, Loew (1860). 



Dipteren-Fauna Sud-Afrikas, p. 210, pi. ii, fig. 14. 



A well-known Ethiopian species, easily distinguished by its elegant 

 coloration. M'Fongosi, Zululand ; Natal, Stella-Busli ; but the 

 species is common and widely distributed over the entire region ; it 

 is hardly distinct from the (Jnental P. fulvula, Wied. 



Subfamily ANTHRACIXAE. 



ANTHRAX, Scopoli (1763). 



This name is used here, not in the usual sense of the authors (for 

 these species, see Villa and Thijridanthrax), for the species of Arcjyra- 

 laoeha which have a l>road third antennal joint, an extended black 

 pattern on the wings and a silvery abdominal apex in the male. The 

 rather numerous species may be tabulated as follows : 



