5U Mr. O. Thomas on 



Scoicecus albiguJa, sp. n. 



Closely allied to S. hindei, Tlios. (locality Kitui, Ukamba), 

 but the whole under surface nearly uniform whitish, the 

 bases of the hairs only faintly greyer (browner on the lower 

 abdomen), the whitish underside of neck in particular con- 

 trasting markedly with the brown upperside. Fur a little 

 softer and more woolly, as is natural at the higher elevation. 

 A band of fine whitish hairs along the membrane just 

 external to the forearm, this part being quite naked in 

 S. hindei. 



Skull slightly longer than that of hindei and its palate 

 rather broader. A minute p^ present on each side in, or 

 close behind, a deep notch in the cingulum of the canine. 

 No such tooth is present in the type of >S^. hindei, but it 

 occurs in the specimen from Nyasaland mentioned by 

 Mr. Wroughton in 1907 t- 



Dimensions of type (the starred measurements taken in 

 the fiesh) :— 



Forearm 38 mm. 



Head and body * 58 ; tail * 35 ; ear * 13 ; third finger, 

 metacarpal 36*5, 1st phalanx 12'5 ; lower leg and hind foot 

 (c. u.) 20. 



Skull : condylo-basal length 14*5 ; basi-sinual length 11 ; 

 front of canine to back of /u'^ 6 ; breadth across palate out- 

 side molars 7'8. 



Hab. Kirui, Mt. Elgon, Brit. E. Africa. Alt. 6000'. 



Type Adult male. Rudd Collection. Original number 

 200. Collected 5th September, 1909, by R. Kemp. 



Heliosciurus gambianus senescens, subsp. n. 



General characters as in H. gambianus, but the whole 

 animal lighter and greyer, the shoulders and hips especially 

 much lighter, owing to a liberal admixture of white or 

 greyish-white hairs. Hairs of the middle of the back and 

 rump ringed with pale buff or cream-buff and black, as 

 compared with the more fawn or ochraceous tone of the 

 light rings in true gambianus. Other characters as in that 

 animal. 



Dimensions of the type (measured in the flesh) : — 



Head and body 220 mm. ; tail 245 ; hind foot 46. 



Skull imperfect. A fully adult skull of another specimen 

 is 47 mm. in greatest length ; upper cheek-teeth 8' 7. 



Hab. Senegal. Type from Thies. 



Type. Immature female. B.M. no. 9. 11. 2. 11. Collected 

 11th May, 1907, by F. W. Riggenbach. Six specimens. 



t Mem. Manchester Phil. t^uc. li. uo. 5, p. 4. 



