602 EAST AFRICAN MAMMALS TRUE. 



This diiniiiutive species closely lesenibles U. l-eUenl Ecuveus, but 

 ;il)i)ears to be slightly larger, Avitli proportionately shorter tail. The 

 ears are decidedly shorter. lu E. l-elloii all the liairs of the under 

 surtaces are gray at the base, while in U. parvus those of the cheeks, 

 chin, and neck are white throughout. The ears have a dark margin in 

 the latter species, but in U. Jcellenl the hairs of the margin are white. 

 The end of the tail is mostly white in E. l-eUeni, but not in E. parvus. 



The type specimen of E. parvus, No. 21005, herein described, is a 

 female?. It was received in alcohol and afterwards made up as a dry 

 skin. It was not accompanied by a label indicating the exact point 

 on the Tana River where it was obtained. 



The collection also contains two species of bats, belonging to the 

 genera Vesper ugo and Nycteris. 



Vesperugo (Vesperus) rendalli Thomas. 



There is a- single specimen of this species, which was described by 

 Mr. Thomas in 1889, from Bathurst, on the river Gambia.* It is a 

 female of smaller size than the typical male specimen. Its dimensions 

 are as follows, in millimeters: 



Cat. No. 



21007? 



Head and hodv — 41. 5 



Tail 33. 5 



Forearm 31. 5 



Head 15.0 



Muzzle to eye 5.8 



Ear, from base of outer margin to tip 12.0 



Thumb, with claw 4. 5 



Lower leg 11. 5 



Nycteris hispida (Schreber). 



Five specimens of this bat were collected, which differ m no way 

 from those originally described. There are three males and two females. 



Of mice, the collecticm contains but one species, which is allied to 

 Mus musculus, and appears to be undescribed. Its characters are as 

 follows : 



Mus tana sp. nov. 



• Size larger than Mus museulus. Tail about one-lifth longer than the 

 head and body, terete, scaly; with sparse hairs, which do not conceal 

 the scales. Ears thin and rounded, rather sparsely clothed with .short, 

 stiff hairs. These are white on the margin of the ears and brown else- 

 where. 



General color brownish-gray above, hoary below; feet white. Fur 

 soft, without spines. 



Hairs of the back of two kinds, namely, long hairs, gray at the base 

 and black distally, and shorter hairs, gray at the base, with a sub- 



*Ann. and Mag. N. If., 6th aer., iii, p. 362. 



