540 Transaction* South African Philosophical Society, [vol. xiii. 



base, the last labial joint is very long, slightly curved inwardly and 

 very slender but does not reach the anterior margin, the surface is 

 obsoletely punctulate ; upper lobe of maxillae with a very long, 

 slender tooth curved inwardly at right angles, the inner lobe with 

 a somewhat robust tooth, and inwardly densely pubescent ; head 

 simple, clypeus very convex at the base, roundly dilated towards the 

 apical part which is marginate, the margin slightly reflexed ; eyes 

 moderately large, the canthus angular ; basal antennal joint very 

 compressed ; prothorax one-third broader than long, more distinctly 

 ampliate rounded laterally in the anterior than in the posterior part 

 the basal angles of which are small but distinct, and the base itself 

 broadly emarginate above the scutellum ; the latter moderately 

 elongated ; elytra broad, strongly sinuate laterally, and having on 

 each side one plain and one evanescent costule ; pygidium sub- 

 vertical, slightly convex ; spiracle of the last abdominal segment 

 almost invisible ; under side glabrous, prosternal process very short ; 

 anterior tibiye bluntly bi-dentate outwardly ; legs robust ; tarsal 

 joints of intermediate and hind legs sub-cylindrical, those of the 

 anterior somewhat short, the four basal ones sub-triangular, claws 

 weak, small. 



Hoplostomus platycephalus, Boh., differs too much from H. fitli- 

 [I i urns to be retained in the same genus. The habits of the two are 

 also not the same, the latter being always found in bee-hives, while 

 A. platycephalus is met with crawling on the ground, and also 

 "under dry cowdung " (G. A. K. Marshall). Other observations 

 lead me to think that it is a myrmecobious species. 



Anatonochilus platycephalus, Boh., 



Insect. Caffr., ii., p. 49 ; 



Westw., Thesaur. Entomol., p. 22, pi. ix., tig. 8. 



Black, little glossy ; head deeply punctured with the sides of the 



clypeus only punctulate ; antennae black ; prothorax covered with 



deep punctures, sub-confluent on the sides, more scattered in the 



posterior median part of the disk where the interspaces are smooth, 



whereas on the sides they are somewhat raised ; the median longi- 



budinal line of the disk is well-nigh obliterated, and there are no 



basal transverse impressions; scutellum deeply punctate along the 



base and on each side; elytra broader than the prothorax, slightly 



narrower at the base than at the apex, the space on each side of the 



suture is somewhat depressed, there is a moderately raised round 



COSta with a plain, somewhat broad, but shallow sulcus reaching 



from below the base to a certain distance from the apex, and next 



