Mammals from Bolivia. 133 



defined white, the bases of the hairs more or less shity, but 

 the extent of this varies very much in the different specimens. 

 Hairs of tliroat white to the base. Ears large, tinely haired, 

 greyish brown, Upi)er surface of hands and feet white. 

 Tail, as usual, long and [jronunently bicolor, dark brown above 

 and white beneath, but it is much less tufted terminally than 

 in the allied forms, the hairs of its terminal inch oidy being 

 lengthened, and these rarely attaining as much as -1 millim. 

 in length. 



Skull similar in all respects to that of E. cachina, except 

 that the bulhe are conspicuously smaller in all dimensions 

 (length 6*2 millim. as against 7-3, breadth between bullaj on 

 basilar suture 3'0 instead of 1*9). 

 Dimensions of the type : — 



Head and body 14:0 millim. ; tail 1-46 (range up to 170) ; 

 hind foot (s. u.) 31 (range from 29) ; ear 25. 



Skull: greatest length 35'4 ; basilar length 27*5; zygo- 

 matic breadth IS'i; length of nasals 15 ; interorbital breadth 

 5'6 ; palate length 15'3 ; diastema 92 ; palatal foramina 

 7*6 X 2'5 ; length of u[)per molar series 5'1. 

 I/ab. of type. Tapacari. Altitude 3000 m. 

 Type. Adult male. B.M. no. 1. 1. 1. -47. Original num- 

 ber 1384. Collected 23rd March, 1901. 



This species may be readily distinguished from its allies by 

 its less bushy tail and smaller bullae, like as it is to these in all 

 other respects. 



The series from Tapacari were all caught in the house. 

 The most interesting point about this species is its extra- 

 ordinary resemblance to PA_y//o</s WoJff'sohni, caught at the 

 same localities. Except that the Eligmoduntia has larger and 

 clumsier feet, it is almost impossible to distinguish the two 

 without examining the skulls. This resemblance in itself is 

 a point in favour of the two animals being really generically 

 different. 



16. Eligmodontia cariUa, sp. n. 



($. Original number 1197. Choro, 3500 m. 11th July, 

 19U0. 



Near E. sorella, but with shorter tail. 



Closely similar externally, in size, colour, and character of 

 fur, to the Peruvian E. sorella *. General colour slightly 

 paler (about Isabella colour of Ridgway), the postauricular 

 spots rather larger, and the longer hairs mixed with the fur 

 less numerous j in other respects the description of E. sorella 



* Anu, & Mrtjr. Nat. Hist. {7) vi. p. 297 (lUOO), 



