762 On new Mammals from Central and Western Asia. 



the range of 0. dauurici, collectecl by M. P. A.nclerson, have 

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

 a general average difference between the two £orms. Biich- 

 ner ^ives, for specimens from Uiga, not far from the typical 

 locality, 30'5, 31, and ^'dcum iingue, wiiich, 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 2Q (s. u.). 



Ochotona rufescens regi'na, 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 ram.; ear, from ba^e of outer edge 

 (dry), 20. _ 



Skull: occipito-nasal length 5 1'O ; 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 aspact (upper anterior 

 to lower posterior edge) 11'7. 



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

 3000'. 



Tt/pe. Adult. B.M. no. 2. 9. 31. Collected 15th August, 

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



Ochotona rufescens vizier^ subsp. n. 



Size smaller than in true rufescens; ears shorter, bulhe 

 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 



Skull: occipito-nasal length 44"5 ; condylo-incisive l?ngth 

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

 breadth 4" 1; parietal breadth 17 ; palatilar lengtli 16 ; bulbi, 

 horizontal antero-posterior length 11; oblique diami'tor ou 

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



Ilab. Central Persia. Type from the Koh-rud north of 

 Isfahan. Alt. 9000'. 



lype. Adult female. B.M. no. 74. 11. 21. 5. Original 

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



This Persian form of O. rufoscens has so much smaller a 

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

 different species, but the ty[)ical, south-eastern, form connects 

 the two. 



