102 Miss G. Ricardo on 



the upper half of the anal cell, the lower half of the latter 

 and almost the whole of the second basal cell being clear ; 

 veins yellowish red on the basal half, and then brown ; the 

 small cross-vein is in the middle of the discal cell, and 

 the base of the second longitndinal is below it, the first 

 posterior cell is narrowed at its opening. 



Length 14 millim. 



Types, male, Fort Johnston ; female, Delagoa Bay, in 

 British ]\Inseuni Collection, 



The female differs slightly in the wing, but is evidently 

 the same species. The pubescence on the first two joints of 

 the antennae is yellow on the underside; the red. on the 

 abdomen is not so marked, being chiefly on the second and 

 third segments, the last two are black with the posterior 

 borders red. The wings are paler in colour, the yellowish 

 red becoming faint brown, and there is dark shading round 

 the vein which divides the discal from the second posterior 

 cell, not present in the male. 



Length 13 millim. 



Division II. — The discal cell with an angle, from which a branch is 

 emitted into the third posterior cell. 



Exoprosopa angulata, Loew, Dipt. Siidafrik. p. 242 (1860). 

 One male from Cape Town. 



Division III. — The discal cell with an angle, from which a vein is 

 emitted which divides the third posterior cell into two cells. 



Exoprosopa dubia, sp. n. 



Four males and five females from Pretoria {W. L. D.). 



The wing is very similar to that of E. reticulata, Loew. 

 Black. 



Face with black pubescence and white scaly hairs. 

 Antennae with black hairs on the first two joints; the bristle 

 short and stout, barely half as long as the third joint. Hind 

 part of head with some white scaly hairs. Collar composed 

 of yellow hairs above, black beneath; the pubescence on the 

 sides of the thorax and on the breast is black, with a few 

 yellow hairs on the anterior part of the thorax, on the dorsum 

 of the thorax it is black, with yellow scaly hairs forming a 

 stripe on the extreme lateral margins. Scutellum with 

 black bristles and some yellow scaly hairs. Abdomen with 

 white hairs on the side of fiist segment, and black on the 

 others; on the dorsum the white scaly hairs are chiefly on 

 the sides of the segments, the last two are almost entirely 



