560 Transactions South African Philoso2ohical Society. j_voL. xii. 



glabrous, and with the anterior part produced into a very long, robust 

 tooth sharp at tip ; anterior tarsi of the male thickened, moderately 

 slender in the female, claws with the onychium as long as the 

 claws themselves and penicillate at tip, basal joint of intermediate 

 and posterior tibiae produced on each side into a sharp spine in both 

 sexes, the upper one being much longer than the lower ; the inner 

 claw of the anterior tarsi of the male is thickened, curved and bifid 

 at tip. 



The genus is represented in Western Africa (Senegal and Guinea). 



Key to the Species. 



Prothorax hardly excavate in the anterior part in the male and 



with two callose tubercles trituhermilatus.. 



Prothorax deeply excavate in the anterior part in the male and 



with two greatly developed triangular tubercles hituherculatus.- 



Ehizoplatys trituberculatus, Burm., 

 Plate XL., fig. 32. 

 Handb. d. Entom., v., 1847, p. 141. 

 Head, prothorax^ and legs piceous black; elytra dark chestnut- 

 brown ; head rugose, the rugosity formed by short, transverse, 

 irregular folds on the clypeus, and transverse punctures on the pos- 

 terior part ; mandibles sharply aculeate in the outer angle and sharply 

 dentate at the inner, clypeus sinuate laterally, sharply attenuate, 

 and with the apical part sub-transverse and reflexed into a short, 

 triangular tubercle, genae produced into a transverse lobe in front 

 of the eyes, in the centre of the head there is a sharp, conspicuous 

 tubercle in both sexes ; prothorax not very convex, distinctly rounded 

 in the median part, attenuate in front, and only slightly sinuate above 

 the posterior angle which is very sharp, it is covered with fine, 

 closely set punctures, which are slightly rugose laterally and in front, 

 but more remote in the median and posterior part of the disk, in 

 the male there is a median, anterior groove forming a narrow 

 excavation and a small tubercle on each side, as well as a not very 

 distinct longitudinal impression above the base, in the female this 

 groove is much more shallow, but it also extends, although it is not 

 very distinct, on the whole of the disk, and there are no tubercles on 

 the anterior part ; scutellum triangular, a little blunt at tip, deeply 

 punctate except at apex ; elytra depressed, slightly sinuate laterally 

 not in the margin itself but a little above it, declivous behind, 

 distinctly callose there, very faintly striate, and covered with small ,_ 



