406 Mr. 0. Thomas on 



41. AUactaga elater dzungarice, subsp. n. 



$ . 250 (old). 100 miles east of Gn-tschen, S.E. Dznn- 

 garia. 4000'. 1st May, 191]. B.M. no. 12.4.1.148. 

 Type. 



Similar to true elater, as represented by specimens from 

 Djarkeiit, but darker in colour, the dorsal area approximately 

 '' drab," not pale buffy as in elater. Under surface more 

 washed with buffy. 



Incisors more slender and rather more throwm forward 

 than in elater. Bar below anteorbital foramen much 

 narrower. Palate with the posterior palatal foramina mucli 

 larger, extendins^ from the middle of im} to the back of m^, 

 the transverse bridge separating tiiem from the anterior 

 foramina consequently much narrower. Other cranial 

 characters as in elater. 



Dimensions of the type (measured in flesh) : — 



Head and body 87 mm. ; tail 164; hind foot 52 ; ear 31. 



Skull: occipito-nasal length 27; condylo-incisive length 

 26*2 ; zygomatic breadth 20 ; breadth of brain-case 15*5 ; 

 vertical thickness of lower anteorbital bar 1'3 (1*8 in elater) ; 

 palatilar length 14*6 ; anterior palatal foramina 5*5 ; 

 posterior palatine foramina 2'2 ; bridge between them 1-3 ; 

 upper tooth series, exclusive of premolar, 4'2. 



Hah. & Tijpe as above. 



42. Ochotona dauurica altaina, Thos. 



c? . 205 ; ? . 201, 203. Atchit Nor, N.W. Mongolia. 

 4500'. 



^. 211, 213 ; ? . 212, 214. Suok, E. slopes of Great 

 Altai. 7000'. 



No. 205 (B.M. no. 12. 4. 1. 149) the type. 



Described Ann. & Mag. Nat. Hist. (8) viii. p. 7()1, 

 December 191 1. 



43. Ochotona macrotis^ G Until. 



? . 335, 336. N. side of Karakoram Mts., Chinese Turke- 

 stan. 13,000-14,000'. 



44. Ochotona (Ogotoma) pj'icei, Thos. 



? . 207, 208. Mts. W. of Atchit Nor (Kobdo Basin), 

 Mongolia. 6700'. 



f^ . 215. Suok, eastern slope of Great Altai. 8000'. 

 No. 208 (B.M. no. 12. 4. 1. 159) the type. 



