1900.] Catalogue of the Coleoi)tera of South Africa. 189 



which is rounded, it is convex, covered with very closely set 

 granules, is broadly impressed in the dorsal part, and has a fine 

 longitudinal hollow line at the bottom of the impression ; elytra 

 ampliato-ovate, finely geminato-striate, and with the intervals filled, 

 with scabrose, pubescent punctures, the second interval is not 

 wider than the third ; pygidium very finely granulose ; median 

 part of metasternum with a distinct median longitudinal line, and 

 having on each side of it some scattered punctures ; inner part of 

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



Male : Frontal carina indistinct, and as often as not entirely 

 wanting, basal part of vertex with a moderately long, vertical horn, 

 triangular at base, acute at tip, sometimes inclining a little forward ; 

 anterior part of prothorax not very declivous at apex, and faintly 

 impressed in the middle there, but not as deeply as in the dorsal 

 part. 



Female : Clypeus as in the male, frontal carina distinct, between 

 the frontal carina and the base, but nearer to the base, there is a 

 very distinct, highly raised transverse carina, with the angles shgirp 

 but not dentate, and in the anterior part of the declivity of the 

 prothorax are two sub-triangular tubercles coalescing at the base 

 when very prominent. 



The colour and shape of the dark aeneous, sometimes black 

 arcuate patch on the elytra varies a good deal in width and length ; 

 normally it should extend from near one humeral angle to the other, 

 and in the centre from the median part to a short distance from 

 the apex, but it sometimes invades the greatest part of the disk, 

 leaving only a flavescent margin all round, or sometimes it nearly 

 disappears altogether. 



Length 6-7 mm. ; width 3-4|- mm. 



Hah. Southern Ehodesia (Salisbury), Ovampoland (Okovango 

 Eiver), Lake N'Gami, teste Boheman. 



Onthophagus opimus, n. spec, 

 Plate XXXY., fig. 20. 



Briefly pubescent ; head and prothorax metallic green, moderately 

 shining ; elytra flavescent, with the suture green ; under side dark- 

 green. 



Male : Genae a little oblique, clypeus rounded laterally, blunt 

 transversely at apex, and hardly emarginate, it is marginate, but the 

 margin is not recurved, and it is plicate, the head is punctulate, has 

 no frontal carina and at a short distance from the base bears a 



