Mammals f rum Bolivia. 1''7 



belly. Eyes rinjjjccl witli yellow. Ears short, wcU-liaiivij, 

 scarcely daiker tiian the hea<l. Hands and feet dull whitish 

 above. Tail well-haired, blackish brown above, dull whitish 

 laterally and b low. 



^^kull small, slender and delicate, with a small narrow 

 brain-case. Interorbifal region smooth, slightly convex 

 above, its edges squarely rounded, not ridged. Anterior 

 plate of zygoma-rout well thrown forward, its front edge 

 vertical. Palatal foramina long, reaching past the middle 

 of n<\ 



Dimensions of the type : — 



Head and body 78 millim. ; tail 65 ; hind foot (s. u.) 19 ; 

 ear 14*5. 



(Skull : greatest length 24-2 ; basilar length 18*8 ; zygo- 

 matic breadth 11"7 ; length of nasals 8"5 ; interorbifal breadth 

 4-5; breadth of brain-case lO'O; ])aiate length 10*2; dia- 

 stema 6*1 ; palatal foramina 5'4 x 1 U ; length of upper molar 

 series 3'4:. 



Hob. as above. 



Ti/jyp. Old female. Original number 1501. Collected 

 15ih July, 1901. 



This is one of the smallest species of the genus. It appears 

 to beljng to the A. xanthorhinas group. 



21. Akodonfumeus, sp. n. 



2 ? . Ohoro, 3500 m. 8th to 10th May, 1901. 



A daik-coloured species of the A. mollis group. 



yize fairly large. Fur very fine; hairs of back about 

 9 millim. in length. General colour dark olivaceous (near 

 "olive" of Ridgway), intermediate between the clear oliva- 

 ceous of A. mollis and pocijicus, and tlie dark colour of 

 A. caliginosus. Under surface almost as dark as the upper, 

 merely rather a paler olivaceous. Face rather more yellowish, 

 indistinct rings round eyes. Ears short, well-haired, con- 

 colorous with head. Upper surface of hands and feet brown, 

 the digits paler. Tail more thinly haired than in the other 

 Andean species, the scales not hidden ; brown throughout, 

 except that the under surface is lighter proximally. 



Skull on the whole very like that of A. mollis. Inter- 

 orbital region similarly broad and rounded. Palatal foramina 

 ruaching past the middle of ///'. 



Dimensions of the type : — 



Head and body 100 millim.; tail 84; hind foot (s. u.) 21 ; 

 ear IG. 



ISkuU: greatest length -ICi', basilar length 20; zygomatic 



