﻿640 Prof. Mario Bezzi's RciJort ov a Collection of 



Head wholly black ; face projecting, the hairs black, with a black 

 fringe, towards the margins of the mouth ; frons narrow for a 

 female, clothed with long black hairs and sparse yellow pubescence, 

 which is also to be seen on the face ; occiput with short grey pubes- 

 cence and white tomentum at the indentation of the eyes. Antennae 

 black, long ; first joint twice as long as the second, which is globular 

 and sometimes of a dark reddish colour ; third joint narrow, elon- 

 gate, twice as long as the two basal joints together ; style short, only 

 half as long as the third joint, bearing a distinct terminal bristle. 

 Proboscis black, a little projecting. Thorax and scutellum black : 

 the hairs of the collar and of the sides are yellow; pleurae clothed 

 with black hairs, but on the propleurae there is a golden yellow 

 tuft ; metapleural tufts black ; the bristles are long and black. 

 Squamulae black, with a white fringe ; haltères black, with greyish 

 knob. Scutellum with long marginal black bristles. Abdomen 

 entirely black ; first segment with a tuft of yellow hairs on the sides, 

 the others showing only black hairs ; the bands of tomentum on the 

 segments are yellowish before and whitish behind ; the patches of 

 large black scales are on the sides of the segments from the second 

 to the last. Venter black-haired ; spines of the female genitalia red. 

 Legs entirely black, with black pubescence and black spines ; ungues 

 black, with the tooth long. Wings long and narrow ; the costal 

 third is blackish, but showing a graduated passage to the posterior 

 darkened portion; cross-veins with indistinct dark borders; the 

 basal comb and the prealar hook are black. No stumps of veins; 

 small cross-vein placed on the first third of the discal cell and a little 

 after the origin of the second vein ; discal cell very long and narrow, 

 not broader than the second basal cell ; first posterior cell very 

 narrowed at the end, second and third of equal width ; the trans- 

 verse vein between the discal and the second posterior cell is very 

 strongly S-shaped. Prediscoidal spot whitish. 



Type Ç, from North Nyasa, Wovwi stream, near Deep 

 Bay, May 14, 1909 (Dr. J. B. Davey); three additional 

 specimens from West Nyasa, Mulowe and Nsisga {Dr. H. 

 S. Stannus) ; another specimen from Nyasaland, Blantyre, 

 April 25, 1910 {Dr. J. E. S. Old). 



54. Exoprosopa sigmoidea, sp. nov. 



^ . Length of the body 12 mm., of wing 13 mm. 



A species belonging to the group of E. dimidiata, but very 

 distinct owing to the strongly S-shaped cross-vein between the discal 

 cell and second posterior cell. 



Head black, with grey pubescence and black erect hairs on the 

 frons; face projecting; mouth edges with a pale fringe, with 



