266 Mr. G. Lewis on 



are settled and the lineal arrangement of the genera somewhat 

 adjusted. 



The genus Probolosternus founded here is a remarkable 

 one, and as three species of it have been recently discovered 

 (one in Guinea and two others in the French Congo), it is 

 highly probable that many more exist in Central Africa, and 

 the species also vary so much in size, which increases the 

 probability that intermediate forms exist, [t is also likely, 

 from the form of the sterna, that the species have the same 

 habits as those of Pachycrcerus, which are known to follow 

 the xylophagous beetles, feeding on the euphorbias and other 

 African shrubs and trees. 



There are two species of the genus Ulster noticed here 

 (H. Marshalli and H. augoniensis) which have the inner 

 subhumeral strias complete, and a reference to them will show 

 how essential it is at times to recognize the importance of the 

 basal oblique humeral stria of the elytra. Sometimes, although 

 rarely, the inner humeral stria is so similar to the first dorsal 

 stria that it is impossible to distinguish the one from the other 

 without noting their position in regard to it. 



List of Species. 



Hololepta dyak. *Pkelister festfvus, Lew. 



syntexis. *Notolister sulcicollis, Lew. 



*Placodes opacus, Lew. Hister nionbasanus. 



Apobletes parallelus. zanibesius. 



cavifrons. augoniensis. 



macilentus. * Marshalli, Lew. 



platessse. brahminius. 



Liopygus chalcis. frontalis. 



*Platy lister mirabilis, Lew. *Coproxenus Marshalli, Leiv. 



* extrarius, Letv. Stictostix parra, Mars. 



cathayi. Notocoelis satur. 



enodis. Sitalia Severini, Letv. 



Platysoma assaniense. Homalopygus reinex. 



disparile. Terapus muricatns. 



Pachycrrerus chlorites. Saprinus punctisternus. 



Probolosternus africanus. castanipes, Curtis. 



permundus. leesus. 



minor. Teretrius Braganzae. 



♦Baconia loricata, Leio. Epiechinus Marseuli. 



Epitoxus corycseus. 



Hololepta dyak, sp. n. 



Oblongo-ovalis, depressa, nigra, nitida ; fronte impressa, mento 

 haud carinato ; thorace lateribus sparse punctulato ; elytris 

 striis dorsalibus brevissimis, l a appeudice curvata ; propygidio 



* Species with an asterisk are not described in this paper, but are 

 figured in the Plate. 



