256 MICROTIN^ 



inhabiting Korea (E. r. regulus) and Japan {E. r. sniithii), agreeing 

 with E. r. rufocanus in general size, shortness of tail, extent and 

 definition of mantle, and in the form of the skull and teeth, but 

 approaching the Far-Eastern forms in general colour. It is thus 

 the connecting link which prevents a specific severance of the 

 bright-coloured, short-tailed boreal form from the dark-coloured, 

 longer-tailed forms of Korea and Japan. Northwards from 

 Shan-Si, it probably intergrades with E. r. rufocanus, eastwards 

 with E. r. regulus, and to the south in Sze-chwan and Hupeh, 

 judging from the immature specimens alone known from those 

 provinces, it makes a near approach to E. r. smithii in character. 



Mr. G. M. Allen says (Amer. Mus. Nov., No. 133, p. 3, 1924) 

 that the series obtained by the Asiatic expeditions of the American 

 Museum, " including ten from Kwei-hwa-ting, Shansi, and five 

 from one hundred miles north-east of Peking, indicates that its 

 range passes into that of rufocanus on the eastward, although 

 separated from it on the north by the Gobi plateau and Ordos desert 

 in Mongolia. Indeed, Thomas has referred a single specimen 

 from sixty miles east of Peking to regulus, but the additional skins 

 from that region secured by the Asiatic Expeditions . . . are 

 quite indistinguishable from the pale form, shanseius. These 

 two forms should be regarded as geographic subspecies of E. rufo- 

 canus " — a conclusion to which I have independently come. 



22c. Evotomys rufocanus regulus Thomas. 



1907. Craseomys regvlus Thomas, P.Z.S., 1906, p. 863; ibid., 1908, 



p. 643. 

 1924. Evotomys rnfocamis regulus G. M. Allen, Amer. Mus. Nov., 



No. 133, p. 3. 



Tyjie.—EM.., No. 6.12.6.89; subadult male (in adult pelage, 

 but m^ still growing), skin and skull ; collected November 25, 1905, 

 by M. P. Anderson ; presented by the Duke of Bedford. 



Type locality. — Min-gyong, 110 miles south-east of Seoul, 

 Korea. Altitude 1100-1300 feet. 



Range. — Korea and westwards into northern China, where it 

 may meet and perhaps intergrade with E. r. rufocanus. 



Characters. — A long-tailed, .short-coated, dark-coloured form 

 with diffuse mantle and enlarged auditory bullae. 



Size as in other subspecies, hind-foot to 21 mm., condylo- 

 basal length of skull in available material to 27-8 mm., but prob- 

 ably reaching 29 mm. in old age. Tail rather long, usually about 

 40% of the head and body length. Fur rather short and dense ; 

 in winter attaining a length of 8-9 mm. on back. Colour dark, 

 the mantle scarcely defined. General colour of upper parts 

 coarsely lined cinnamon-brown in most specimens, but darkening 

 in adults to a rich and beautiful cinnamon-rufous or hazel of 

 unusual intensity. Sides paler, without definite line of demarca- 

 tion from either back or belly. Under surface broadly washed 



