﻿Bomhyliidae (Vijotera) from Central Africa. 649 



yellowish ; claws yellow at the base, with a small tooth. Wings 

 broad and long, greyish hyaline, the anterior half darkened, its limits 

 being irregular and not sharply defined ; the veins arc a little 

 margined with fuscous. Venation as in the preceding siDecies, but 

 the origin of the second longitudinal vein opposite to the small cross- 

 vein ; the first posterior cell is, moreover, not so narrowed at the base. 



Type ^ and Ç, mid two additional specimens from North 

 Nvasa, bush near Wovwi stream, November 27 and 28, 1901) 

 (Dr. J. B. Davey). 



69. Exo]prosopa heterocera, sp, nov. 



$ . Length of the body 11 mm., of the wing 10 mm. 



A black species with unspotted wings, readily distinguished by the 

 colour and the shape of the third antennal joint, which approaches 

 to that of the species of Thyridanthrax of the group represented by 

 T. degans. 



Head black, with white tomentum and with black erect hairs 

 on the frons ; face projecting, with white hairs on the sides ; occiput 

 with argenteous scales at the margins of the eyes ; proboscis black, 

 not projecting. Antennae with the first two joints short, black, the 

 first with short black hairs ; third joint very long, more than twice 

 the first two together, of linear shape, not pointed, obtuse at the tip, 

 with a very minute less distinct style; its colour is yellow, darkened 

 towards the end. Thorax black, with grey hairs and black bristles ; 

 hairs on the pleurae white. Haltères black, with the knob white 

 below. Scutellum black, yellow at the margin. Abdomen black,' 

 with Avhite tomentum ; first segment with tufts of white hairs on 

 the sides; spines of the female genitalia long, dark yellow. Legs black, 

 black pollinose and with black spines ; hind claws small, yellow at 

 the base, with a small tooth. AVings uniformly smoked, the second 

 posterior cell and the base of the discal cell being a little more clear ; 

 base and costal cell yellowish-brown, first basal cell and the middle 

 of the subcostal cell darkened. Small cross-vein placed before the 

 middle of the discal cell, the second longitiidinal vein beginning 

 opposite it ; first posterior cell a little narrowed at the end, second 

 and third of almost equal width ; discal cell not broader than the 

 second basal cell, which equals it in length ; third posterior cell 

 very short. Veins yellow towards the base, blackish at the end ; 

 basal comb black, very small. 



Type Ç, from North Nyasa, Marimba, near Chia River, 

 January 21, 1910 (Dr. J. B. Davey) ; a single specimen in 

 not very good condition. 



