190 Mr. O. Thomas on 
by its black-backed ears and hidden digital pads, and cranially 
by its much more proodont incisors. 
Biichner’s O. melanostoma, from Kan-suand the Koko-Nor 
regions of ‘Tibet, is another form very closely allied to 
curzonie, and can, at most, only be recognized as a subspecies 
of it. 
Ochotona g/overi, sp. n. 
A Pika allied to O. erythrotis, Biicln., but without a reddish 
mantle in the summer pelage. Bulle smaller. 
Size large, about as in O. erythrotis. General cclour of 
body dark lined greyish, with black tips to the hairs. Nape 
with obvious but not conspicuous post-aural drabby-white 
patches, the specimen being in summer pelage. Under sur~ 
face soiled greyish, the hairs slaty at base, whitish terminally. 
Sides and top of muzzle dull fulvous ; “cheeks grey, crown 
darker grey. Ears, apart from the brownish margin of the 
proectote, deep cinnamon, the metentote a little paler than 
the proectote ; extreme edges, as usual, whitish. Hands and 
feet above white, the brush below dull brown. 
Skull as figured in erythretis, but the bulla not so large. 
Palatal bridge apparently broader. 
Dimensions of type :— 
Head and body 204 mm.; hind foot 31. 
Skull: upper length 46, condylo-incisive length 43; 
zygomatic breadth 23°5; interorbital breadth 6°2; breadth 
of brain-case 19 ; palatal bridge 2°8 ; prams | length 
of bulla 10; upper tooth-row (alveol:) 9. 
Hab. W. Sze-chwan. Type from Nagehuka, 10,000’. 
Type. Adult male. B.M. no. 13. 9. 13. 17. Collectors 
number 213. Harvard number 7589. Collected 10th August, 
1908, by W. R. Zappey. 
This species was assigned by Mr. Glover Allen to Biichner’s 
erythrotis, and it is undoul stedly nearly allied to that species. 
But in August, if the same as erythrotis, it should have a 
rufous or falvous mantle, and there is no trace of this in the 
specimen. Its bulla are also smaller than those figured in 
erythrotis. 
“The value of these characters has been impressed on me by 
iny recent studies of the genus, but it is not surprising that, 
at a time when such a study was impossible for want of 
material, Mr. Allen did not think them sufficient for distin- 
euishing the species. In now doing so, 1 have much pleasure 
in naming this striking red-eared Pika in his honour. 
