﻿134 Annals of the South African Museum. 



between the fourth posterior aud the same cell ; the first posterior cell 

 is not narrowed at end. 



Another example from Salisbury, S. Ehodesia. 



Thyridanthrax linea, Loew (1860). 



Allied to the preceding species, but easily distinguished by the 

 wings being blackish at the base and along the subcostal cell. 

 Originally described from Caiïraria, but, as it seems, widely spread 

 over tlie Ethiopian region. There are in the collection two female 

 specimens on the same pin, without precise locality, aud another from 

 East London, Cape (R. M. Lightfoot). 



Thyridanthrax abruptus, Loew (1860). 

 Dipteren-Fauna Sud-Afrikas, p. 219, pi. ii, fig. 20. 



A medium-sized species, distiuguished by the broad blackish 

 markiug on the wings and by the different neuration. 



Eather Avidely spread over the Ethiopian region, and common in 

 South Africa, from where it was originally described. In Northern 

 Rhodesia this species has been bred from puparia of Glossina inorsi- 

 tans. There are numerous specimens of both sexes from M'Fongosi, 

 Zululand, March, 1914 (W. E. Jones) ; from Hex River (Cape), 

 January, 1886 (L. Péringuey) ; from Bushmanland, Jackal's Water 

 (Cape), October, 1911 (R. M. Lightfoot) ; from Dunbrody, Uitenhage 

 (Cape), March, 1912 (J. O'Neil) ; from O'Okiep, Namaqualand 

 (Cape), October, 1895 (L. Péringuey). 



In the present species the contact of the third posterior with the 

 discoidal cell is strongly sinuous, and three or four times longer than 

 that of the fourth in the same cell. 



Thyridanthrax transiens, Bezzi. 



A small species closely allied to abrujAus, but distinct by the more 

 extended black pattern of wings, the base of the 4th posterior eel 

 and more than the half of the anal cell being also ])lackened- 

 Originally described in my work of the Bombylidae of the British 

 Museum from Nyassaland, there is a specimen from Salisbury, 

 S. Rhodesia, 1917.' 



