1900.] Catalogue of the Coleoi^tera of South Africa. 221 



Onthophagus tenuicoenis, Klug, 

 Plate XXXV., 'fig. 39. 

 Monatsb. Bed. Ac, 1855, p. 654; Peters' Eeis., 1862, p. 236. 

 0. chalcostomus , Falir., Insect. Caffrar., ii., p. 310. 



Sub-coppery bronze, or bronze green, moderately shining, briefly 

 pubescent, but the pygidium is clothed with a dense, conspicuous 

 silky white pubescence ; head roughly punctured, gense rounded, 

 clypeus rounded, but blunt at tip and very slightly emarginate 

 there, frontal carina very faint in the male but distinct in the female ; 

 antennae piceous red, club fuscous ; prothorax moderately convex, 

 declivous in the anterior part, ampliate laterally, slightly marginate 

 along the base which is rounded, distinctly depressed longitudinally 

 in the middle in the posterior part, and covered with deep punctures 

 set very close and separated from one another by rugose walls ; 

 elytra moderately ampliato-ovate, narrowly but deeply punctato- 

 striate, intervals plane and filled with three series of irregular, 

 nearly confluent, foveolate punctures which are very briefly 

 setigerous, second interval not wider than the third, humeral callus 

 not very prominent ; pygidium very closely punctulate and densely 

 pubescent ; under side very pubescent ; metasternum closely punc- 

 tured, median longitudinal impressed line not distinct ; inner part of 

 anterior tibiae not spinose at tip, apical spur nearly straight. 



Male : Vertex produced into two long vertical horns compressed 

 laterally, and varying greatly in length. They may reach higher 

 than the apex of the prothorax or be reduced to a mere conical 

 tubercle ; the prothorax is sloping in the anterior side, and more or 

 less deeply impressed in the centre of the slope according to the 

 development of the cephalic horns. 



Female : Vertex produced in a transverse sub-basal, slightly 

 arcuate high lamina the angles of which, in the great development, 

 are sometimes produced in a moderately long horn ; prothorax 

 with a median, sub-quadrate, shining tubercle on the top of the 

 anterior declivity. 



Length 5-9 mm. ; width 3-5 mm. 



Hah. Natal (Durban, Estcourt, Frere, Maritzburg) ; Cape 

 Colony (Griqualand West, Somerset East) ; Transvaal (Eus- 

 tenburg) ; Southern Ehodesia (Salisbury) ; Mozambique (Eikatla). 



Onthophagus obtusus, Fahr., 

 Insect. Cafl"rar., ii., p. 313. 



Black, but slightly metallir?, moderately shining, almost glabrous, 

 elytra chesnut-bronze, very feebly pubescent ; antennae ferruginous^ 



