On a new Dend rom us from Mt. Elgon. 275 



muzzle in front of p* 50 ; palate 81 ; upper tooth-row 47 ; 

 length of upper molars 28 ; bulla? 17'5. 



Hob. Zomba, Nyasa. 



Type. Old male. B.M. no. 94. 6. 7. 7. Collected by 

 A. Whyte, and presented to the Natural History Museum by 

 Sir H. H. Johnston. 



The grizzling so characteristic of the colouring of the more' 

 northern forms is in shirensis so fine and faint that, at quite 

 a short distance, the coat seems to be unicolorous ; this and 

 the pale, bright ochraceons colouring serves to distinguish it 

 at once from the other races. 



In the latest collection of mammals made by Mr. R. Kemp 

 in the Elgon District of Biitish East Africa was a number of 

 specimens of a Dendromus. The bulk of these specimens 

 were D. acrceus, a species described by me in the December 

 issue of these' Annals' ; but amongst them was a specimen 

 so entirely different from them and from any other species 

 known that it seems to me to deserve a name. 



Dendromus ruddi, sp. n. 



A Dendromus about the size of D. nyikce, closely resembling 

 D. messorius, Thos., from the Cameroons, in colouring, but 

 with larger ears and a longer hind foot and tail. 



Eur of back 7-8 mm. long, basal two-thirds dark slate- 

 colour, distal portion " tawny ochraceous." General colour 

 above between "mars-brown" and cinnamon. Hands and 

 feet pale ; tail dark above, rather paler below. 



tSkull small ; smaller, narrower, and more delicately made 

 than in messorius. 



Dimensions of type (measured by the Collector) : — 



Head and body t>9 mm. ; tail 91 ; hind foot 18'5 ; ear 11*5. 



fckull : greatest length 21; basilar length 15"5; greatest 

 breadth 11; nasals 7*6; interoibital breadth 3"5 ; biain-case 

 breadth 9*5 ; diastema 5 '6 ; upper molar series 3*5. 



Hub. Malikisi, Mt. Elgon, B. E. A. Alt. 5000'. 



Type. Old male. Rudd Collection. Original number 476. 

 Collected by R. Kemp, 28th November, 1909. 



D. ruddi closely resembles messorius in its colouring, while 

 its size and proportions are like those of nyika. There is no 

 other species with which it might he confused, nor any other, 

 of its size, in which the median black line is entirely absent. 



