252 MICROTIN^ 



male, skin and skull, collected April 3, 1910, by M. P. Anderson, 

 and presented by the Duke of Bedford; type loralilij : Mountains, 

 S.E. of Tau-cho'w, Kan-Sii, C^hina. Altitude 10,000 feet. 



1911. Microliis ((V/n/o(/»/.s) Inez Thomas, P.Z.S., 1911, p. 176. 



1911. Microtus (Caiijomys) nux Thomas, P.Z.S., 1911, pp. 176 and 

 691. 



1911. Microtus (Caryomys) alcinoiis Thomas, Abstr. P.Z.S., 1911, 

 p. 50. and P.Z.S., 1912. p. 140; type: B.M., No. 11.9.8.136, im- 

 mature male, skin and skull, collected November 24, 1910, by 

 M. P. Anderson, and presented by the Duke of Bedford; type 

 locality : Wei-choe, Si-ho River, W. Sze-chwan, China. Altitude 

 8000 to 10,000 feet. 



1912. Craseomys aquilus G. M. Allen, Mem. Mus. Comp. Zool., Har- 

 vard Coll., 40, p. 216; type : Mus. Comp. Zool. Harvard, No. 7190, 

 " adult " [immature] male, skin and skull, collected May 17, 1907, 

 by W. R. Zappey ; type locality : Showlungtan, Hupeh, China. 

 Altitude 7000-9000 feet. 



1923. Caryomys inez Hinton, Ann. Mag. N.H., [9], 11, p. 162. 



1924. Evotomys rufocanus shanseius G. M. Allen, Amer. Mus. Nov., 

 No. 133, p. 3. 



1924. Microtus (Caryomys) aquilus G. M. Allen, Amer. Mus. Nov., 

 No. 133, p. 6. 



Type.—BM., No. 8.8.7.85; subadult male (iifi still growing), 

 skin and skull; collected December 4, 1907, by M. P. Anderson, 

 and presented by the Duke of Bedford. 



Tijpe locality. ^100 miles N.W. of Tai-Yuen-Fu, Shan-si, North 

 China. Taken in a spruce forest at an altitude of 8000 feet. 



Range. — Mountains of Northern, Western and Central China; 

 extending from Shan-si eastwards towards Mongolia where it 

 probably intergrades with both E. r. rufocamis and E. r. regulus, 

 and southwards into the mountains of Shen-si, Kan-su, Sze- 

 chwan and Hupeh. 



Characters. — Size, proportions, and skull essentially as in the 

 tyjncal subspecies ; colour of upper parts sandy in adults. 



Adult pelage (in typical series).^ — Fur long, soft and loose; 

 hairs of back (in winter coat) 12-13 mm. in length. Mantle fairly 

 sharply defined, essentially as in E. r. nifocanus, but much paler, 

 its colour a dull, pale yellowish brown (not far from " Dresden 

 brown "), darkened inconspicuously by a sprinkling of long black 

 hairs. Face, sides, and rump grey, without rufous suffusion, but 

 the hairs covering ears and those of the post-auricular j^atches with 

 yellowish or rufous ti])s. Under surface lighter, the long tips of 

 the hairs pale cream buffy, their general effect much darkened 

 by the slaty hair-bases. Hands and feet white above ; soles 

 rather densely haired. Tail densely clad (in winter) with stifE hairs, 

 the annulations not visible, brown above, whitish or cream- 

 coloured on sides and below. Adults in summer pelage (Shan-si 

 or typical series) are slightly j^aler and duller with thinner coats ; 

 in them the tail is much less hairy, the annulations being dis- 

 tinctly visible. 



Young in first pelage dusky ; between this blackish coat and 



