﻿On the BoinhijJiid Fauna of South Africa (Dijdera). 101 



Type (^ , a, siu^-le specimen from Transvaal, Barberton, December, 

 1916 (H. Edwards); a damaged male specimen from Basutoland, 

 Likhoele (Dieterlen) seems also to belong here, but has the knob of 

 haltères entirely whitish above. 



cf . Length of body 6 mm. ; of wing 6 mm. ; of wing spread 13 mm. 

 Head black ; eyes in profile much narrowed aliove and touching for a 

 very long line, even longer than in barhafxs ; the hairs of occipital 

 border and of verte.x are scarce, short, darkish ; ocellar tubercle black 

 and very small ; frontal triangle very small and grey-dusted. Face 

 very narrow, a little prominent, clothed Avith dense, whitish tomentum, 

 quite l»are even on the sides ; the genae with scai-ce, white hairs which 

 are directed forAvards ; lower part of the occiput with long white 

 hairs. Antennae entirely black ; first joint long and thin, not broader 

 than the third, with scarce, short, darkish hairs ; second joint globular, 

 third joint linear, gradually tapering into a long point ; it is twice as 

 long as the first. Proboscis black, 1-5 mm. long ; palpi black. Thorax 

 and sciitellinn dull Idack, the former more gibbose than in the two 

 preceding species ; the hairs are whitish, and tlie short dust below 

 them is whitish, not golden ; no distinct bristles. Squamulae whitish, 

 with yellowish boi'der and with white marginal hairs ; haltères 

 yellowisli, with the knol.i l)lack above. Abdomen black, narrowly 

 yellowish at base of venter, and clothed like the thorax ; genitalia 

 entirely reddish. Legs in the greatest part reddish, only the four front 

 femora being more or less blackened ; the coxae are reddish on the 

 apical half; hairs and dust whitish. Wings greyish-hyaline, iridescent, 

 Avith pale yelloAvish stigma; veins dark, Avith yellowish base. Culntal 

 fork twice as long as broad, obtuse at base, Avitli the upper branch 

 rounded at base, and originating much beyond the upper end of the 

 apical cross-vein of the discoidal cell ; middle cross-vein beyond the 

 middle of the rather elongate discoidal cell, the terminal vein of Avhich 

 is S-shaped but not much oblique. Stalk of anal cell moderately 

 long. 



(teron dichromus. Bigot (1892). 



Very distinct from all the other known South African species of the 

 genus on account of its prevalent yelloAvish colour. 



Described Avith a query from South Africa, I think that a single 

 male specimen from Aus, S. West Protectorate, 1916 (Dr. Ivnobel), 

 may be referred to it, even if it has the Avings quite hyaline. I give 

 a description of this specimen. 



(^ . Length of body 6 mm. ; of Aving 6 nam. ; of proboscis, 2-.5 mm. 

 Head black : occiput with scarce and very short dark hairs above like 



