858 Transactions South African Philosophical Society, [vol. xir. 



abdomen of the male compressed laterally, pygidium sloping for- 

 wards ; legs long, slender, similar in both sexes, anterior tibiae 

 tri-dentate outwardly, the teeth oblique and equi-distant, the basal 

 one very small ; antei'ior claw double, the outer one very small and 

 simple, the inner one slightly cleft, intermediate ones single but 

 cleft, posterior ones single, simple ; in the male the claw of the 

 intermediate legs has a conspicuous tooth underneath, and the 

 metasternum has on each side of the anterior part a Ijroad, oblique, 

 tomentose patch, while the rest of the surface is scaly. 



Key to the Species. 



Clypeus deeply emarginate at the apex ; elytra with the whole 

 interval between the suture and the first costule filled with a broad 

 band of flavescent white hairs huinernlh. 



Clypeus slightly emarginate at the apex ; whole surface of elytra 

 covered with small, somewhat closely set sub-flavescent scales . . sulcirollis. 



Knysna humeralis, Burm., 

 Ischnochelus humeralis, Handb. d. Entomol., iv., 1, p. 132. 

 Male : Black, legs with the exception of the hind tibise reddish, 

 antennae of the same colour as the legs, but with the club infuscate ; 

 prothorax with a median longitudinal liand of whitish scales and a 

 supra-lateral one not very well defined ; elytra with a l)road band 

 of similar but a little more flavescent scales at a short distance from 

 the suture, pygidial part, abdomen and pectus scaly ; head scabrose, 

 sparingly hairy, clypeus distinctly narrowed, strongly bi-dentate at 

 the tip ; prothorax with a deep median longitudinal furrow reaching 

 from the apex to the base, the anterior and lateral margins are 

 fringed with long, stiff bristles, the sides are deeply but not closely 

 punctured, the punctures being filled witli scales, but between the 

 median furrow and the punctures there is a longitudinal smooth 

 area ; scutellum not scaly in my examples, but the scales may 

 have been rubbed off'; elytra nearly parallel, but still a little 

 attenuate laterally towards the apex, very little sinuate, they are 

 rugulose and have on each side two slight costae the outer of which 

 is hardly distinct, and the interval between the first and the suture 

 is tilled with the band of scales, which is slightly oblique and reaches 

 from the base to a very short distance from the apex ; the pygidium 

 is scaly like the propygidium and the abdomen, but the scales are 

 much more scattered ; the claw of the intermediate legs has a 

 conspicuous, sub-horizontal tooth underneath in the male. 



