668 Annals of the South African Museum. 



long as the declivity. Scale thicker, its dorsal edge obtuse, the 

 posterior face slightly convex. Otherwise like the 3j_. 



§ minor, 4 , 8-5 , 8 mm. Ochreous, the posterior half of the head 

 and the meso-epinotum somewhat darker. Very similar to the § minor 

 of etnarginatus, but larger and differing from it and from crepusculi 

 in the pronotum which is distinctly flattened above. The scale of the 

 petiole is inclined forwards and has a thick dorsal face which is 

 two and a half times wider than long. The anterior face merges 

 gradually into the dorsal face and is very convex, the posterior face 

 flat and longer than the anterior. Otherwise like the § media. 



Slievyre, Natal. (Haviland), ex. Natal Museum coll. 



This species is easily recognised in the % caste by the shape of 

 the head, the clypeus and the strongly contrasted colours of the head 

 and thorax. 



(R.M., G.A, colls. ; types in my collection). 



C. nasutus, Emery. 

 Ann. Soc. Ent. France, vol. 63, p. 53, %, §(?), 1895. 



"%. Sordid testaceous, anterior margin of head dark ferruginous, 

 abdomen, except the base and the apical margins of the segments, 

 blackish; dull, abdomen nitidulous. Pilosity and pubescence very 

 scanty, the latter short. Head truncate behind, very little narrower 

 in front than behind, frontal carinae distant, sinuate, the clypeus 

 convex transversely, barely carinate, produced in front into a narrow 

 porrect lobe which is tridentate at the apex. Mandibles convex, sex- 

 dentate. Thorax robust, the pronotum obtusely marginate, the meta- 

 epinotal suture defined, the dorsum of the epinotum merging arcu- 

 ately into the declivity. Scale moderately compressed, obtusely 

 truncate above, its edge not trenchant. Tibiae feebly compressed, 

 setose below. 



9 mm. long ; head, as far as apex of clypeus, 2"8 mm. long, 2-3 mm. 

 wide; scape 1*9 mm.; posterior femur 2*6 mm. maximum width of 

 thorax 1-7 mm. 



Pretoria, one specimen, (Simon). 



This species is remarkable chiefly on account of the clypeus, 

 strongly arched transversely, the lobe of which, narrow and produced, 

 forms a sort of beak, truncate and ending in 3 teeth, which are 

 almost as strong as those of the mandibles. The depressions between 

 the median and lateral pieces of the clypeus are very deep, and the 

 lateral pieces project forwards .... The sculpture is like that which 

 is seen in many dull forms of C.maculatus; a fundamental reticulate- 



