o/ </<« Xerus erytliropus Group. 389 



Skull : greatest length 64 ; basilar length 50 ; zygomatic 

 breadth 32-5 ; palate length tVom henselion 30-3 ; front o£ 

 large premolar to back of m^ 12 ; breadth of posterior upper 

 premolar 3' 8. 



Ilab. Masindl, Unyoro. 



Type. Adult female. B.M. no. 2. 11. 1. 5. Collected 

 23rd June, 1897, by Dr. W. J. Ansorge. 



An isolated skull and two young skins collected by Emin 

 Pasha in Monbuttu appear also to be referable to this tbrm. 



Xerus microdon, sp. n. 



General colour above tawny clay-colour, becoming more 

 blackish on the crown and muzzle, more ochraceous on the 

 base of the tail. White markings as in X. erijthropus. Dark 

 area below lateral line blackish brown. Sides of belly and 

 inner sides of limbs washed with pale bufFy. Forearms dull 

 buflfy. Upper surface of hands and feet cream-buff. Bases 

 of tail-hairs strong ochraceous buff. 



Skull- as usual. Posterior upper premolar comparatively 

 small, cylindrical. 



Dimensions of the type (measured on the skin) : — 



Head and body 285 mm. ; tail 225 ; hind foot (wet) 63. 



Skull : greatest length 62 ; basilar length 49 ; zygomatic 

 breadth 33; palate length from henselion 29 ; front of large 

 premolar to back of m^ 12 ; diameter of large upper pre- 

 molar 3. 



Ilah. British East Africa. Type from Kitui, alt. 1000 m. ; 

 other specimens from Ukambani [Jackson). 



Tijpe. Adult male. B.M. no. 1. 2. 5. 4. Original num- 

 ber 51. Collected 20th September, 1900, and presented by 

 S. L. Hinde, Esq. 



Xerus microdon fuhior^ subsp. n. 



Similar in all essential characters to true microdon, but 

 the colours richer, darker, and more tawny throughout. 

 Back tawny ochraceous, becoming deep rufous on rump ; 

 hands, wash along sides of belly, hind limbs, and top of teet 

 ochraceous buff instead of huffy or cream-buff. Forearms 

 between ochraceous and clay-colour. Bases of tail-hairs dark 

 tawny. 



Dimensions of type : — 



Head and body 295 mm. ; tail (imperfect) ; hind foot Q'l. 



Skull : greatest length 645. 



