242 MICROTIN^ 



with a slight intermixture of black-tipped hairs ; sides ochraceous, 

 including the front and sides of the head ; ventral surface bright 

 buff. Tail dusky above, bright buff on sides and below, heavily 

 clothed. Ears tipped with rusty internally. 



For external and cranial measiirements, see tables at end of 

 volume. 



Remarks. — This species is said by Dr. Allen to differ from E. 

 uvsnessenskii and E. rutilus in the much lighter red of the dorsal 

 area, the strongly ochraceous sides, buffy under parts, and smaller 

 size. 



20. Evotomys amurensis Schrenck. 



1859. Arvicola amurensis Schrenck, Reise Amur-lande, 1, p. 129; 



Poljakov, 1881, p. 55. 

 1907. Evotomys amurensis Thomas, P.Z.S., 1907, p. 413. 



Type. — St. Petersburg [Leningrad] Museum, No. 1854-331 ; 

 adult. 



Type locality. — Mouth of the Amur River, near Nicolaieff. 



Range.— kamx; Saghalien (Thomas, P.Z.S., 1907, p. 413). 



Characters.- — Closely resembling E. mikado of Japan in general 

 appearance, skull, and teeth. Size medium (hind-foot 18 mm.; 

 condylo-basal length of skull about 24 mm.), tail rather long, 

 about half length of head and body, and slender. Fur short and 

 thin ; hairs of the back attaining a length of about 10 mm. 

 Colour dark and rich ; mantle rather better defined laterally than 

 in E. mikado, dark reddish brown ; flanks and cheeks greyish 

 tinged with ochraceous ; under parts whitish-grey much darkened 

 by hair bases. Tail very thinly haired, dusky above, yellowish- 

 white below, with a thin pencil of dark and whitish hairs. 

 Feet white, the soles very thinly haired, almost naked between 

 heel and pads. 



Skull smaller than in E. mikado, but very similar in all other 

 respects. Cheek-teeth (Fig. 78, 5), showing a similar longitudinal 

 crowding of parts ; m^ with well-developed third inner fold and 

 fourth inner angle, and with a fifth inner angle in youngish stages 

 of wear. 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — I am indebted to Mr. Montagu for notes upon the 

 skull of the type in Leningrad Museum. 



21. Evotomys mikado Thomas. 



1905. Evotomys mikado Thomas, Abstr. P.Z.S., No. 23, p. 19, Dec. 5, 

 1905, P.Z.S., 1905 (1906), p. 352; ibid., 1907, p. 413. 



Type.— B.M., No. 6.1.4.296; adult female, skin and skull, 

 collected Nov. 13, 1904, by M. P. Anderson; presented by the 

 Duke of Bedford. 



