410 



Annals of the South African Museum. 



Lower jaw with 2 large hooked teeth and a smaller tooth between 

 these just anterior to the hinder one. 



Dentition of ? as in lethalis, the upper jaw with 2 small teeth 

 between the second and third large ones. 



Colour. Head-plate and mandibles reddish yellow, the head-plate 

 infuscated just behind the pale anterior border ; the legs also 

 reddish yellow in the ? , but pale yellow in the $ . Under side of 



19 



tiolj)uga serrat'icornis, n. sp. 3 . Fig. 1G, left mandible from inner side. Fig. 

 16, apex of right flagellum from the lateral side more highly magnified. 



S. schlechteri, n. sp. $ . Fig. 17, right mandible from lateral side. Fig. Via, 

 distal part of same mandible from above. 



S. veiiosa, 11. sp. 3 Fig. 18, left mandible from inner side. Fig. ISa, apex of 

 left flagellum from above. 



S. lethalis, Koch. Fig. 19, metatarsus and tarsus of palp from the side. Fig. 

 19o, rostrum (apical tuft of hairs not sketched in). 



body pale yellow, greyish in one 5 specimen. The tergal plates of 

 the abdomen and the upper portion of the soft skin on each side of 

 these plates black. The hairs and bristles on the legs, head-plate, 



