Descriptive List of the, Rodents of South Africa. 193 



Description. General colour above light rufous-brown, freely 

 pencilled with darker brown, paler on the sides, below dull white ; 

 head short and somewhat bulky posteriorly ; nose-tip black-brown ; 

 ears oval, thinly covered with hairs ; tarsi ashy brown grey ; toes 

 shorter than in G. afer ; tail reddish brown above, with blackish hairs 

 intermixed, a little shorter than the head and body. 



Incisors above Dutch-orange, below white, much larger than in 

 G. afer, and distance between them and the molars less (Smith). 



Dimensions. Head and body 6'0 ; tail 5'0 (Smith). 



Distribution. Sir A. Smith's specimens were obtained near the 

 sources of the Orange and Caledon Eivers in what is now Basuto- 

 land ; the type of M. maccalinus, was collected by Wahlberg in the 

 Maccali ( == Magaliesberg) Mountains in the Rustenberg district of 

 the Transvaal. It is also recorded from the Transvaal by Mr. de 

 Winton. There are no examples in the South African Museum. 



GEEBILLUS LOBENGULAE, LOBENGULA'S GERBILLE. 



Gerbillns leucogaster, apud DE WINTON, Proc. Zool. Soc., p. 806 

 (1896) (nee Peters). 



Gerbillns lobcnynlac, DE WINTON, Ann. Mag. N. H. (7), i., p. 4 

 (1898). 



Description. General colour above pale fawn, finely grizzled with 

 dull black along the back, pure along the sides ; below pure white, 

 the two colours abruptly separated ; in other external characters 

 resembling G. afer. 



Skull with a narrow facial portion across the nasals and maxillae 

 between the infraorbital foramina. 



First upper molar persistently cuspidate, the second lobe being 

 divided into a pair of cusps outer and inner in fairly adult specimens 

 (de Winton). 



Dimensions. --Head and body 5'30 ; tail 6'30 ; hind foot 1'33 

 (de Winton). 



Distribution. This form was obtained by Mr. F. C. Selous, at 

 Essex Vale, near Bulawayo, and was first identified by Mr. de 

 Winton with G. leucogaster of Peters, and subsequently considered 

 to be a distinct species ; the type and only other known examples 

 are in the British Museum. 



GEN. PACHYUEOMYS. 



Pachyuromys, LATASTE, Le Naturalists, i., p. 314 (1880). Type P. 

 duprasi. 



