184 Transactions South African Pliilosophical Society, [vol. xii. 



ONTHOrHAGUS LANISTA, Cast., 



Plate XXXV., fig. 16 ; Plate XXXVIII., fig. 25. 

 Hist. Nat. d. Ins., ii., 1840, p. 84. 



0. aulicus, Fiihr., Ins. Caffr., ii., p. 266. 



Colour, shape, and sculpture of 0. subextensus, but it is slightly 

 smaller on the average. In the male the length of the cephalic horn 

 is shorter in proportion, but has the same shape ; the prothorax is 

 excavated in the centre of the anterior part, this excavation is 

 abrupt, and has on each side, at the apical part, a nearly vertical, 

 compressed, long, sharp horn, and no tubercle whatever on the top 

 of the anterior declivity which is not divided into two excavate parts 

 as in 0. subextensus. 



As for the female it is almost impossible to distinguish it from that 

 of 0. subextensus ; the punctures on the sides and in front of the 

 prothorax are, however, a little more closely set. 



I have not seen any small development of the male, only of the 

 female ; in the case of the latter the anterior part of the prothorax 

 had hardly any trace of tubercles. 



Length 11-15^ mm. ; width 7-9 mm. 



Hab. Natal (Durban, Estcourt, Frere), Transvaal (Potchef- 

 stroom). 



Onthophagus tricorniger, Bohem., 



Ofvers. Vet. Ak. Forh., 1860, p. 113. 



Male : iEneous green or flavous with the head and median part 

 of the prothorax bronze ; genaB diagonal with their outer angle very 

 sharp, clypeus semicircular, hardly reflexed, no frontal carina, but 

 instead a long, slender, arcuate horn reaching as far as the median 

 part of the prothorax, compressed laterally and distinctly emarginate 

 behind at the base, the head and the basal part of the cephalic horn 

 are distinctly granulose ; the prothorax is declivous in front for two- 

 thirds of the length, it has on each side of the median declivity a 

 deep impression bounded outwardly by a nearly straight, very long, 

 sharp horn on each side ; the prothorax is covered with very closely 

 set granules, except the anterior impressions which are smooth and 

 shining, it is ampliate in the middle, marginate all round, the basal 

 part is not aculeate at middle, and it is slightly impressed longi- 

 tudinally in the middle in the posterior part ; elytra very little 

 ampliated laterally, geminato-striate, intervals plane, closely punc- 

 tulate, the punctures setigerous, humeral callus not very much 

 marked, second interval broader at middle than the third ; pygidium 

 closely punctured ; metasternum closely punctulate in the middle, 



