﻿On the Boiiibi/Uid Fauna o/ Su nth Africa (Dlphra). 12o 



Anthrax hessii, Wiedemann (1818). 



An elegant species, very distinct owinij; to tlie well-defined and 

 characteristic wing pattern. 



It is known only from South Africa. Griftsberg, Van Rhyusdorp 

 (Cape), September, 1911 ; O'Okiep (Cape), September, 1890. 



A female specimen from Hex River (Cape), December, 1884, deter- 

 mined by Bigot as Anthrax ininctipen.nis, Wied., seems to belong to 

 this species, but is aberrant in having the first submarginal and the 

 first posterior cells almost hyaline to the base, and therefore the 

 hyaline spot after the discal cross-vein is wanting. 



Anthrax diffusus, Wiedemann (1824). 



Closely allied to the preceding, but at once distinguished by the less 

 defined and more extended wing pattern, the isolated dai'k spots being 

 therefore much less marked. Known from South Africa and recorded 

 by me from Nyassa. A single male specimen from Bushmanland, 

 Jackal's Water (Cape), October, 1911 (R. M. Lightfoot) ; an old 

 specimen of great size (37 mm. of Aving expanse), without a head, 

 with wholly infuscated wings. 



It is notable that of A. diffusus I have seen males only, and of 

 hessii females only ; they are perhaps the two sexes of a single 

 species. 



Anthrax aygulus, Fabricius (1805). 



A species of great size with dimidiate wings and two dark spots 

 in the vitreous part. 



Widely spread over the entire Ethiopian region, and seemingly also 

 over the whole Oriental region. A single female specimen from 

 Dunbrody (Cape), March 20th, 1912 ; the species was not yet recorded 

 from South Afi'ica. 



Anthrax trimaculatus, V. der Wulp (1868). 



Easily distinguished from the allied species by the presence of three 

 isolated brown spots in the hyaline part of the wings. 



A female specimen from East London, Cape Colony, July, 1014 

 (R. M. Lightfoot). 



Anthrax pusillus, Wiedemann (1821). 



Very like A. ayguhis, but only half its size. 



Widely spread in Africa, but less known : very like the Oriental 

 distigma, Wied., but smaller. A single male specimen from Hex 



