170 Annals of the South African Museum. 



border alone. It is near argyrophora , Bezzi, from Nyassaland, but is 

 distinct, the last abdominal segments being clothed with white scales. 



Type <$ , a single specimen from S. W. Protectorate, Otjituo, January, 

 1920, collected by (E. W. E. Tucker), in whose honour it is named. 



<^ . Length of body 11 mm.; of wing 11 mm. Head deep black and 

 black haired, with scattered yellowish scales on the frous ; face conically 

 produced ; proboscis not at all projecting ; antennae quite black, with 

 the third joint briefly conical, as long as the two first joints together ; 

 style thin, as long as the third autenual joint. Thorax and scutellum 

 entirely black, with black hairs and black bristles ; on the back there 

 are scattered yellowish hairs, which form a complete broad stripe on 

 each side above the uotopleural line ; collar yellowish, pleurae black 

 haired, with a yellowish uotopleural tuft ; metapleural tuft yellowish 

 above and black below ; squamulae dark yellowish, with white fringe ; 

 halteres with yellow knob and dark stalk. Abdomen entirely black ; 

 first and second segment with dense white hairs on the sides, the rest 

 of the sides with black hairs alone ; on the back it is clothed with black 

 and yellowish scales, the second and third segment and the sides of 

 the sixth and seventh being clothed with silvery scales ; venter black, 

 black scaled and black haired. Legs quite black and black-scaled. 

 Wings with black veins : terminal loop of second longitudinal vein 

 double ; first posterior cell not narrowed at end, about a half as broad as 

 the second, which is as broadly open as the third ; discoidal cell at end 

 twice as broad as at base, its terminal cross-vein being short and 

 straight ; anal cell narrowed at end. The wings are typically dimidiate, 

 black and hyaline ; the limit between the two portions goes a little 

 toothed from the end of the first longitudinal vein, over the base of 

 the first submarginal and first posterior cells, across the basal third of 

 the discoidal cell, over the base of the fourth posterior cell, over the 

 two basal thirds of the anal cell to the basal half of the axillary lobe ; 

 praediscoidal spot broad and whitish. 



EXOPROSOPA (EXOPROSOPA) PUNCTULATA, Macq. 

 A female from S.W. Protectorate, Tsumeb, December, 1919 

 (E. W. E. Tucker). 



EXOPROSOPA (ExopROSOFA) sTANNusi, Bezzi. 

 A female specimen from S.W. Protectorate, Otjivarouga, 1920. 



EXOPROSOPA (EXOPROSOPA) LUTEICOSTA, Bezzi. 

 A female specimen from S .W. Protectorate, Tsumeb, December, 1919 

 (E. W. E. Tucker). 



