612 Mr. 0. TIioin;)S on 



8. Eaneomys (^Auiiscomys) leucurus, Thos. 



' ? . 1428, 1443, 1445. Sierra de Zenta, 4500 m. 



Tlie type came from La Lagunita, Maimara, in tlie near 

 neighbourhood of the present locality. 



9. Neotomys vxilturnus, sp. n. 



c?. 1452 ; ? . 1427, 1430, 1434, 1435. Sierra de Zenta, 

 4500 m. 



Paler and with rather longer tail than ehriosus. 



Size and general essential characters apparently quite as in 

 ehriosus. Fur long and fine, ordinary hairs of back about 

 12 ram. in length, overlapped by fine long piles attaining 

 24 mm. General colour a fine grizzled mixture of grey and 

 buffj, almost as m pale forms of Siymodon, the fore back 

 more grey, the rump becoming more and more bufiy, and 

 cuhninating in a rich ochraceous patch at the base of the tail. 

 Sides greyer. Under surface slaty grey, finel}' washed with 

 whitish. Chin and interramia white. Muzzle with a 

 prominent patch of rich ochraceous. Ears brown, a few hairs 

 on and around tliem buffy. Hands and feet with pale buffy 

 metapodials and white digits. Tail longer than in ebriosus, 

 brown above, buffy on sides, dull whitish below. 



Skull a|)parently quite as in ebriosus. 



Dimensions of the type: — 



Head and body 155 mm. ; tail 73 ; hind foot 22"5 ; 

 ear 18. 



jSkull : greatest le:igth 30 ; condylo-basal length 27-6 ; 

 zygomatic breadth 17 ; nasals 12'2 X 6 ;'interorbital breadth 

 3"1 ; palatilar length 12'6 ; palatal foramina 6*9 ; upper 

 molar series 6. 



Ilab. as above. Two specimens were previously obtained 

 by Sr. Budin at Lagunita, Maimara, 4300 m. 



Ti/pe. Old female, B.M. no. 21. 11. 1. 34. Original num- 

 ber 1427. Collected 6th May, 1921. 



Tiie discovery of Neotomys in Jujuy is very unexpected, 

 as its only known locality has hitherto been Central Peru, 

 where Kjilinowski got the type, a spirit-specimen, and P. O. 

 Simons, shortly afterwards, obtained a skin. The Jujuy 

 atiimal is remarkably like that of Peru, differing oidy in 

 having a longer tail and a paler general colour, while the 

 greyish fore back is less strongly distinguished from the 

 butty rump, and the under surface is a duller grey, less 

 whitened on the sides of the belly, and without the dark 

 brownish sternal band which is present on the skin sent by 



