762 Oil new Mammals from Central and Western Asia. 



the range of 0. dauurica, collected by M. P. Anderson, have 

 it 26, 26, 27, 27, 27, 27-5, 28, 28, 29, so that there is evidently 

 a general average difference between the two forms. Biich- 

 ner gives, for specimens from Urga, not far from the typical 

 locality, 30"5, 31, and 33 c«>n ungue, which, if 4 mm. is taken 

 off for the claw, make 26*5, 27, and 29, thus corresponding 

 closely with the Taboul set. An example said to be from 

 Amur-land {Frank) has the hind foot 26 (s. u.). 



Ochotona ruftscens regina, subsp. n. 



Similar to true rufescens in all essential respects, but size 

 larger, as gauged by skull. Bullae at a maximum. 



Dimensions of the type : — 



Hind foot (s. u.) 37 mm.; ear, from base of outer edge 

 (dry), 20. _ 



Skull: occipito-nasal lengtli 51'5 ; condylo-incisive length 

 48*4; zygomatic breadth 25; nasals 16'6 ; interorbital 

 breadth 3*2 ; parietal breadth 20 ; palatilar length 19"2 ; 

 palatal foramen 15'5 ; bullae, horizontal antero-posterior 

 length 13"3, oblique diameter on side aspect (upper anterior 

 to lower posterior edge) 11'7. 



Hah. Kopet Dagh, west of Ashabad, Transcaspia. Alt. 

 3000'. 



Type. Adult. B.M. no. 2. 9. 31. Collected 15th August, 

 1902, and presented by St. G. Littledale, Esq. 



Ochotona rufescens vizier^ subsp. n. 



Size smaller than in true rufescens-, ears shorter, buUse 

 smaller. Colours tending to be rather brighter and more 

 contrasted. 



Dimensions of type : — 



Hind foot (s. u.) 31 mm. ; ear, from base of outer edge 



Sliull: occipito-nasal length 44-5 ; condylo-incisive length 

 39*5 ; zygomatic breadth 22*3 ; nasals 14 ; interorbital 

 breadth 4-1 ; parietal breadth 17 ; palatilar lengtli \Q ; bulla, 

 horizontal antero-posterior length 11 ; oblique diameter on 

 side aspect (upper anterior to lower posterior edge) 9-5. 



Hah. Central Persia. Type from the Koh-rud nortli of 

 Isfahan. Alt. 9000'. 



2>pe. Adult female. B.M. no. 74, 11. 21. 5. Original 

 number 560. Collected 20th July, 1872, by W. T. Blanford. 



This Persian form of 0. rufescens has so much smaller a 

 skull than the more northern 0. r. regina as to look quite a 

 different species, but the typical, south-eastern, form connects 

 the two. 



