African Coleopterous Fauna. 221 



by raised, irregular folds, in the male the scabrose-punctate frontal part 

 is produced from the raised frontal suture into a triangular lamina 

 dividing at the tip into two divaricating sharp horns, and having a 

 short triangular tooth in the centre, the two teeth barely reach the 

 height of the anterior part of the prothorax, the median anterior part 

 of which is sub-vertical and impunctate along the base and also on 

 each side of the declivity, but otherwise covered all over with very 

 closely set granules denser and smaller on the centre of the disk than 

 on the sides, the upper part of the anterior declivity is simple, in 

 shape the prothorax is slightly broader than long, finely carinate 

 along the base and the posterior angles are rounded ; in the female the 

 clypeus is less semicircular, the clypeal suture is arcuate and sharply 

 carinate, the frontal part closely granular, and there is a slightly 

 arcuate lamina-like ridge with sharp outer angles situated between 

 the eyes but stopping at some distance from them ; the anterior part 

 of the prothorax is not as highly raised as in the male and is therefore 

 proportionately less declivous, but it is plainly bituberculate ; the 

 intervals of the elytra are plane and very closely punctured ; the 

 closely punctate pygidium is nearly as broad as long in both sexes ; 

 in the male the inner spur of the anterior tibiae is nearly straight, but 

 it is slightly inflexed inwardly at tip in the female. 



Mons. d'Orbigny informs me that this species is moderately closely 

 allied to 0. pictipodex, D'Orb., but that the armature of the head is 

 very different ; he thinks, however, that his 0. pictipodex was 

 described from female examples. 



Length 8J-9^ mm. ; width 5-5^ mm. 



Hab. Southern Ehodesia (Sebakwe). D. Dods. 



ONTHOPHAGUS SERENUS, n. sp. 



Black, shiny, with extremely minute hairs in the punctures of the 

 head and prothorax, hardly pubescent underneath, club of antennae 

 black ; clypeus deeply incised in front, and with the angles very 

 sharp and reflexed, genae triangular, projecting, there is no distinct 

 clypeal suture or keel, but a slight carinulate elevation reaching the 

 two genae, the frontal part is simple, but there is a distinct, oblique 

 supra-ocular ridge ( 3 ) ; the prothorax is broader than long, rounded 

 laterally, the outer margins are not highly carinate and the base has 

 no distinct fold, the surface is covered with sub-contiguous cicatricose 

 punctures, coarser on the sides than on the disk ; elytra longer than 

 the prothorax with the striae distinct and the plane intervals finely 

 granulose; pygidium broader than long, very closely punctulate, and 



