560 Transactions South African Philosophical Society, [vol. xiii. 



the back of the third part of the length and parallel with the edge is 

 a wavy ridge, and on the posterior margin, in the apical half, a well- 

 developed, truncate tooth. Prosternal process broad, rounded at tip, 

 the corners bent outwards, the back border granulose and hairy. 

 Mctusternum not thickened but very coarsely granular. 



Female : Clypeus blunt, not acuminate ; legs normal ; metasternum 

 tolerably symmetrical, not so coarsely granular." 



Ilab. Kubub ; German South-West Africa. 



Gen. ONTHOPHAGUS, Latr., Cat. i., p. 168. 



Since the publication of my Catalogue of the Scarabseidie (April, 

 1901), M. H. d'Orbigny has published a considerable number of 

 African species, among which are included 5 South African species 

 of the genus Caccobius, 58 of the genus Onthophagus, 3 of the sub- 

 genus Proagodcrus, and 2 of the genus Phalops, exclusive of several 

 species which have been sunk in synonymy. With some additions 

 of mine the actual number of the genera and sub-genera above 

 mentioned, with the genus Diastellopalpus thrown in, is now 213 

 instead of 112, as given in my Catalogue. Many, if not most of the 

 additions, are from the confines of the South African limit, and I 

 believe that many more Central African species will eventually be 

 found to occur also in South Africa. It is somewhat puzzling to find 

 that certain specimens roam nearly all over Africa, south of the 

 Sahara, while others are limited, as far as is now known, to a com- 

 paratively small or very limited area. Several, if not many, Senegal 

 and Abyssinian forms have their counterparts further south ; these 

 differ mostly in the sculpture of the prothorax especially, but also 

 of the head and elytra ; and the differences can be ascertained only 

 by comparison. This difference between the greater and smaller 

 development is also very great in many kinds, exactly in the same 

 manner as in the genera Copris, Catharsius, itc., adding thus to the 

 great difficulties that beset the identification of species. 



I have not, unfortunately, been able to procure or examine a 

 comparatively large number of d'Orbigny's new or lately de- 

 scribed South African species, and it is thus impossible for me to 

 even make an attempt at giving a key of the South African kinds, 

 but this gentleman has very courteously placed at my disposal a list 

 of the kinds known to him to occur in South Africa, and arranged 

 according to the affinities they bear to each other. He has also 

 revised my grouping of the species with the table of the six divisions 

 which he has proposed (Ann. Soc. Ent. Fr., lxxi., 1902, p. 19) for the 

 reception of the host of African species — a host, the number of which 

 seems to increase yearly. 



