IfOO.] Catalogue of the Coleoptcm of South Africa. 227 



sub-tectiform in the dorsal part, and have two series of broad, 

 deep, sHghtly setigerous punctures ; pygidium deeply and mode- 

 rately closely punctured ; metasternum punctate in the centre, 

 median impressed line little distinct ; inner part of anterior tibiae 

 non-spinose at tip, apical spur very long and slender, nearly 

 straight. 



Female unknown. 



Length 4-4^ mm. ; width 2i^-2f mm. 



Hab. N'Gamiland, teste Boheman, Southern Khodesia (Salisbury) » 

 Limpopo Eiver (teste Fahroeus), Natal (Estcourt). 



Onthophagus ambiguus, n. spec, 

 Plate XXXVI. , fig. 2. 



Head and prothorax bronze or bronze with a greenish tinge, 

 shining, elytra pale testaceous and with fuscous, irregular maculae 

 sometimes suffusing the median part of the disk ; head roughly 

 scabrose in the anterior part and clothed with rigid dense setae, 

 smooth in the basal part, clypeus semicircular, slightly emarginate 

 at apex, frontal carina distinct ; prothorax ampliate laterally, very 

 little convex, marginate all round although less conspicuously so along 

 the base which is rounded, than on the sides, punctulate but not 

 closely, and hardly pubescent ; elytra more elongate than ampliato- 

 ovate, narrowly geminato-striate, intervals plane and having two and 

 one series of scabrose, briefly setigerous punctures not closely set ; 

 pygidium with a few scattered setigerous, scabrose punctures ; 

 metasternum smooth in the median part except for a few deep 

 punctures in the anterior part, median impressed line distinct ; inner 

 part of anterior tibiae non-spinose at tip, apical spur nearly straight 

 in both sexes. 



Male : Vertex of head wath two sharp, somewhat short, conical 

 horns close to the frontal carina, anterior part of prothorax sloping, 

 deeply impressed, and having in the centre of the apical margin a 

 conical tubercle, and two blunter ones at the top of the anterior 

 declivity, the impression is less impressed, and the anterior tubercle 

 as well as the apical ones are less conspicuous when the cephalic 

 horns are little developed. 



Female : There is no carina on the vertex, and the prothorax has 

 merely a small impression and a faint trace of a small tubercle in the 

 anterior part. 



Length 7-8^ mm. ; width 4-5 mm. 



Hab. Natal (Isipongo). 



