1900.] Catalogue of the Coleoptera of South Africa. 439 



a thick whitish yeUow or pale straw-colour coating over the 

 sculpture. There are sexual differences, and in one the outer teeth of 

 the tibiae are three in number in the male, the two apical ones being 

 united at base, whereas in the female the basal one is absent ; in the 

 other species, the male of which is unknown, the female has three 

 normally disposed teeth. 



One of the two species is known to occur in Abyssinia."' 

 The shape of the valves of the penis differ much from that of 

 Ayhodius, being quite cylindrical at base, and sub-orbicular at tip. 



Key to the Species. 



Elytra with four sharp carinae, of which the third is obliterated 

 at a short distance from the base on each side sulcicollis. 



Elytra with two sharp carinse and a slightly raised supra-lateral 

 costa on each side impressicollis. 



Sybax sulcicollis, Bohem., 

 Insect. Caffr., ii., p. 366, pi. i., fig. D, 1, 5. 



Entirely covered with a pale straw-coloured coating hiding nearly 

 the whole sculpture ; body glabrous, but with the sides of the head 

 and prothorax fringed with very dense, pallid hairs, outer part 

 of anterior tibiae and inner part of the intermediate and posterior 

 ones also fringed with short hairs ; antennse ashy grey ; in the male 

 the clypeus is deeply impressed in front, broadly emarginate w4th the 

 angles of the emargination produced in a distinctly recurved tooth, on 

 each side of the central part there is another impression divided by a 

 long, longitudinal tubercle abutting towards the apex on a moderately 

 raised transverse carina ending on each side in a sharp but small 

 tubercle ; in the female the clypeus is deeply emarginate, but not 

 toothed, and the central longitudinal tubercle, and also the juxta- 

 ocular apical ones are not so much developed ; prothorax deeply 

 sinuate in front, slightly diagonal laterally, but straight from the 

 anterior to the posterior angle which is sharp, the base is marginate,, 

 deeply sinuate near the outer angle and less so in the middle, in the 

 median part of the disk there is a broad, deep, longitudinal groove 

 with rounded walls, a broad, transverse impression in the anterior 

 part on each side, and a sub-parallel one at about the median part 

 which is more pronounced in the female, and the fringe of slightly 

 curling hairs is very dense ; in the male the whole surface is hidden 



* Mr. G. A. Marshall informs me that he has found S. sulcicollis fairly common 

 in dung, and on the wing in the daytime. 



