r 



EVOTOMYS 219 



Colour. — In winter pelage : rufous mantle diffuse and ill- defined, 

 extending from eyes nearly to base of tail and tending to spread 

 slightly over sides. In general colour it is very nearly the " mars- 

 brown " or " prouts-brown " of Ridgway, usually with a tinge 

 of russet, the exact shade resulting from various combinations of 

 cinnamon-rufous, vinaceous-rufous and black. Sides and cheeks 

 dull brownish buff thickly sprinkled with black. Flank colour 

 merging insensibly in that of back, sharply contrasted with that 

 of belly. Under surface grey, with a variable but usually con- 

 spicuous wash of buff. Hairs everywhere with slaty bases, which 

 irregularly darken the sides and under parts. Ears reddish like 

 the back. Feet whitish, more or less distinctly tinged with brown. 

 Tail sharply bicoloured, dark brown above, dirty white or buffy 

 below. 



In summer pelage paler above. 



Skull small, the cheek-teeth light. Auditory bullae not 

 abruptly inflated on inner side, a character scarcely appreciable, 

 however, except on comparison with E. g. istericus ; m^ with 

 third iimer infold present in about one-half the specimens ex- 

 amined. 



For external and cranial measurements, see tables at end of 

 volume. 



2i';. Evotomys glareolus britannicus Miller. 

 1832. Arvicola riparia Yarrell, P.Z.S., 1832, p. 109, and Loudon's 



Mag. Nat. Hist., 5, 1832, p. 599; not Arvicola riparius Ord, 1825 



(= Microtus pennsylvayiicus). 

 1837. Arvicola pratensis Bell, Hist. Brit. Quadr., p. 330. 

 1874. Arvicola glareolus Alston in Bell, Hist. Brit. Quadr., ed. 2, p. 327. 

 1895. Microtus glareolus Lydekker, Brit. Mammals (Allen's A^at. 



Lihr.), p. 213. 

 1898. Evotomys glareolus Thomas, Zoologist, p. 101. 

 1900. Evotomys hercynicus hrittanicus MiUer, Proc. Wash. Acad. Sci., 



2, p. 103. 

 1903. Evotomys glareolus britannicus Barrett-Hamilton, Proc. R. Irish 



Acad., p. 317; Trouessart, Faune Mamm. d'Europe, 1910, p. 170; 



Miller, Catal. Mamm. W. Europe, 1912, p. 634; Barrett-Hamilton, 



Hist. Brit. Mamm., 2, p. 405, 1913. 



Type.—BM., No. 7.7.7.2944 (Miller Coll.); adult female, 

 skin and skull, collected by G. S. Miller. 



Type locality. — Basingstoke, Hampshire. Yarrell described 

 his '■ Arvicola riparia " from a specimen obtained at Birchanger. 

 Essex, England. 



Range. — Great Britain. 



Characters.- — Distinguished from E. g. glareolus by deeper 

 general colour and slightly smaller average size (hind-foot 15-18 

 mm., condylo-basal length of skull 21 •4-24-2 mm.). 



The reddish mantle extends from the forehead in front of the 

 eyes to the base of the tail, and in colour is usually near " van- 

 dyke brown," strongly washed with '' cinnamon rufous," and 



