Additions to tlie Bombyliid Fauna of South Africa (Diptera). 475 



Proboscis black, not projecting beyond the mouth. Thorax entirely 

 black, clothed on the back with shining scales, which in certain 

 lights are whitish, and seems to be disposed in front on three broad 

 longitudinal stripes ; the collar and the sides along the notopleural 

 line bear long and dense tufts of golden-yellow hairs ; pleurae black, 

 with like tufts on pro-, meso- and metapleura. Scutellum black, 

 clothed, like the back of mesonotum, with black bristles at hind 

 border. Squamae brown, with white fringe ; halteres whitish. 

 Abdomen entirely black ; the hairs of sides are white at base and 

 black on the remainder; the third segment has a broad, complete, 

 transverse band of white scales at the base, and similar bands are to 

 be seen on the sixth and seventh segment, the remainder being clothed 

 with black scales. Venter black ; spines of the ovipositor reddish 

 brown. Legs black, with smooth front tibiae ; front tarsi with short 

 thin hairs ; hind femora with a complete row of bristles below ; spicules 

 of the 4 posterior tibiae black and long ; hairs of coxae black like all the 

 others ; claws simple ; no pulvilli. Wings proportionately long and 

 broad ; they are hyaline, iridescent, with yellowish base and with a 

 faint but distinct yellowish tint along the costal cells and into the 

 basal cells. The veins are yellow, blackened to the terminal half, but 

 the costa is entirely black. Basal hook slender, long, curved, black ; 

 basal comb golden, with black bristles at border. Second longitudinal 

 vein originating opposite to the discal cross-vein, with broad and flat 

 loop at end ; upper branch of the cubital fork much retreating at base ; 

 discal cross- vein placed before the middle of the discoidal cell ; first 

 posterior cell long and narrow and slightly but distinctly narrowed at 

 end ; second posterior ce 11 at e nd three times broader than the pre- 

 ceding one and as broad as the following; fourth posterior cell as 

 broad as the two preceding cells taken together, its basal contact with 

 the discoidal cell short, being only a quarter of that of the preceding- 

 cell with the same cell ; anal cell broadly open. Alula rounded, 

 yellowish, with white fringe ; axillary lobe broad, hyaline iridescent. 



LITOKRHYNCHUS, Macq. 



LlTORRHYNCHUS DILATATUS, BeZZl (1921). 



Very like a small specimen of L. maurus and likewise with black 

 and black-fringed squamae, but belonging to the section of the genus 

 in which the second posterior cell at end is not or only a little more 

 narrow than the third, the vein between them being less twisted. 



One ? specimen from S.W. Protectorate, Otjiverongo, April, 1921 

 (J. S. Brown). 



