Mammals from Peru and Bolivia. 181 
Hab. Mapiri, Upper Beni River, W. Bolivia. Alt. 800 m. 
Type. Male. B.M.no.1.1.1.57. Original number 1197. 
Collected 27th August, 1900, by Mr. P. O. Simons. One 
specimen. 
Native name “‘ Taware”’ (P. O. S.). 
This subspecies of the Tayra is characterized by its general 
brown colour, all the other forms—including the one described 
by Tschudi from Peru, on which Dr. Nehring’s “ peruana” 
is presumably based—being either black, or, if at all brownish, 
at least with a wholly black tail. 
Rhipidomys pheotis, sp. n. 
A rather small reddish species allied to &. mécrotis, Thos. 
Size about as in R&R. microtis and fulviventer. Fur close 
and fine; hairs of back about 8 millim. in length. General 
colour above fulvous, lined with black on the back, clearer 
rufous on the sides. Face more greyish. Under surface 
white throughout, or the extreme bases of the hairs slaty ; 
line of demarcation on sides well defined. Ears of medium 
size, blackish brown, contrasting markedly with the general 
colour of the head. Front of fore limbs and metacarpals 
like back, fingers white; outer side of hind limbs fulvous, 
darkening to brown on the distal part of the metatarsus, 
toes white. Tail well-haired, pencilled, uniformly blackish 
brown. 
Skull in size and general appearance not unlike that of 
R. fulviventer, but with a broader interorbital region. 
Palatal foramina shorter than in either of the allied species, 
not reaching back to the level of the front of m.’. 
Dimensions of the type (measured in the flesh) :— 
Head and body 112 millim.; tail broken; hind foot, s. u. 
23°5,c. u. 25; ear 18. ‘The tail of the second specimen, of 
about the same general size, is 115 millim. in length. 
Skull: greatest length 30°2; basilar length 23°5; greatest 
breadth 16°3; nasals, length 9°8; interorbital breadth 5:3 ; 
breadth of brain-case 14; interparietal 4-4 x 11°2; diastema 8; 
length of palate from henselion 12:5; palatal foramina 5 ; 
length of upper molar series 4:2. 
Hab. Segrario, 13° 5'S., 70° 5! W., Upper Inambari, 8.E. 
Peru. Alt. 1000 m. 
Type. Male. B.M. no. 1. 1. 1. 23. Original number 
1146. Collected 23rd July, 1900, by Mr. P. O. Simons, 
‘wo specimens. 
This species seems to be most nearly allied to R. microtis, 
