TWO NEW PIGMY GERBILS 
55 
Dipodillus luteus, sp. n. 
Allied to D. Harwoodi, Thos., but distinguished by its very 
much duller and paler colour. 
Size of body as in Harwoodi ; tail rather shorter. 
General colour of dorsal surface dirty drab-buff, near 
f tawny-olive ’ (Ridgway 1912), washed over with greyish 
brown, the resulting effect very much paler and more subdued 
than in Harwoodi. Backs of hands and feet and undersurface 
of body white. 
Skull slightly larger, with broader nasals and wider brain- 
case. 
Dimensions of type (measured in the flesh). — Head and 
body 74 mm. ; tail 94 ; hind foot 21 ; ear 10. 
Skull ; greatest length 26*5 ; basilar length 19*8 ; zygo- 
matic breadth 18*5 (approximate) ; interorbital constriction 5' 4 ; 
breadth of brain-case 12’ 8 ; length of anterior palatal 
foramina 5 ; length of upper cheek-teeth (from front alveolar 
border to back of last molar) 4. 
Hab. — Southern Guaso Nyiro, Nyanza Province, British 
East Africa. Altitude 6500 feet. 
Ty'pe. — Adult male, B.M., No. 18, 10, 18, 65. Original 
number 118. Collected by W. P. Lowe, Esq., on November 29, 
1912, and presented to the British Museum by G. P. Cosens, Esq. 
The pale drab colour of this form immediately separates 
it from Harwoodi, diminutus, and Percivali. 
We have thus four species of the genus Dipodillus in British 
East Africa : (1) D. diminutus, from the Northern Guaso 
Nyiro (altitude 8200 feet) ; (2) D. Percivali, from Voi (altitude 
2500 feet) ; (8) D. Harwoodi, from Naivasha (altitude 6800 
feet) ; (4) D. luteus, from the Southern Guaso Nyiro (altitude 
6500 feet). 
