148 Mr. O. Thomas on 



tawnj brown, darkened by the ends of the hairs being black. 

 Colour of flanks encroaching on the sides of belly, the lateral 

 hairs of the belly being tipped with tawny, and its white 

 area consequently narrowed. Top of muzzle black. Orovvn 

 tawny brown like back. Hairy band across sole distinct. 

 Tail long, well-tufted, dark brown above, dull drabby or 

 buffy below. 



Skull like that of T. emmi, but slightly larger. 



Dimensions of no. 1188 (type), measured in flesh: — 



Head and body 135 mm.; tail 170; hind foot 33; 

 ear 20. 



Skull : greatest length 36*5 ; condylo-incislve length 31*2 ; 

 interorbital breadth 'o'Q ; anterior palatal foramina 6'8 ; 

 posterior palatal foramina 4*1 ; upper molar series 5. 



Hah. Upper Welle. Typical locality, Poko. 



This fine Taterillus is readily distinguishable from T. emini 

 and T. nigerice, its nearest allies, by its much darker and 

 more tawny colour, its contrasted dark dorsal area, and the 

 encroachment on the pure white of the belly by the tawny 

 colour of the flanks. 



Mylomys alherti, sp. n. 



A large species, ochraceous posteriorly, with white under- 

 side. 



Size large, the skull as large as in the figure given by 

 Heller of his " Pe.lomys roosevelti" *. That figure is said to 

 be of the natural size, but is larger than the dimensions 

 given in the descri})tion. General colour above coarsely 

 mixed black and buffy, very much as in M. lutescens, but 

 posteriorly the colour becomes ochraceous or rufescent, 

 richest at the base of the tail. Sides paler. Under surface 

 and inner sides of limbs strongly contrasted pure white, the 

 hairs white to their bases. Hands and feet buffy on meta- 

 podials, the digits whiter. Tail blackish above, buffy on 

 sides, whiter below. 



Skull large and strongly built, with heavy muzzle and 

 strongly developed supraorbital ridges. Molars propor- 

 tionally rather small, not as large as in the smaller Af. 

 Intescens. 



Dimensions of no. 1231 (the type), measured on the skin : — 



Head and body (c.) 170 mm. ; tail 170 ; liind foot 35*5. 



Skull : greatest length 38'5 ; condylo-incisive leiigtif 35 ; 

 zygomatic breadth 18 ; nasals 15*2 ; interorbital breadth 5 ; 

 palatilar length 18*2; palatal foramina 7'6x2'6; upper 

 molar series 7*6. 



Hab. Poko, Upper Welle. 



* Smiths. Misc. Coll. vol. Hv. p. 1, pi. i. (1910). 



