230 MICROTINiE 



Characters. — Most closely resembling E. n. norvegicus, but 

 perhaps slightly larger (hind-foot 18-6-19-6 mm. ; condylo-basal 

 length of skull 25-26 mm.) ; m^ with usually only two inner 

 infolds. With a duller narrower mantle and less bufiy sides. 



For external and cranial measurements, see tables at end of 

 volume. 



5/. Evotomys nageri norvegicus Miller. 



1877. Arvicola glareolus Collett, N. Mag. f. Naturvsk., 22, p. 65. 



1898. Microtus glareolus Collett, N. Mag. f. Naturvsk.. 36, p. 278. 



1900. Evotomys norvegicus Miller, Proc. Washington Acad. Sci., 2, 

 p. 93; Trouessart, Faune Mamm. d'Europe, 1910. p. 166; Barrett- 

 Hamilton and Hinton, P.Z.S., 1913, p. 829; Ann. Mag. N.H., 

 [8], 12, p. 364, 1913. 



1911. Euotomys glareolus CoUett, Norges Pattedyr, p. 79. 



1912. Evotomys glareolus norvegicus Miller, Catal. Maram. W. Europe, 

 p. 638. 



1914. Evotomys nageri norvegicus Barrett-Hamilton, History of British 

 Mammals, 2, p. 421. 



Tijpe.—V.^. Nat. Mus. No. 84674; adult female. 



Tyj)e locality. — Bergen, Norway. 



Range. — Western Norway, north at least to Nordland; 

 apparently confined to the western watershed. 



Characters.- — Slightly smaller than E. n. nageri (hind-foot 

 18-4-19 mm.; condylo-basal length of skull 24-2-26-2 mm.); 

 general colour nearly as in E. n. nageri ; mantle broad, not sharply 

 marked off from buffy-grey flanks ; skull heavily built ; m* 

 usually with only two inner infolds. 



Summer pelage : mantle broad and rather ill defined, in colour 

 dull ferruginous slightly varied with light wood-brown and much 

 darkened by a uniform sprinkling of black-tipped hairs, fading 

 rather abruptly into the light wood-brown of face, cheeks and 

 sides. Rumji wood-brown, tinged with red in median line and 

 forming no noticeable contrast with mantle. Under surface pale 

 drab-grey washed to a varying degree with yellowish-brown and 

 irregularly darkened by slaty bases of hairs. Feet dull white, a 

 dark shade at outer side of ankle. Tail sharply bicoloured, dark 

 brown above, whitish below. 



Skull averaging rather smaller than in E. n. nageri, but 

 decidedly larger and more heavily built than in E. glareolus. 

 Zygomata heavy, abruptly expanded anteriorly, the greatest 

 zygomatic breadth opposite anterior ends of molar series. Post- 

 orbital jarocesses distinct but very small. Braincase moderately 

 high and rounded, distinctly rectangular in outline when viewed 

 from above. Nasals squarely truncate posteriorly, ending a little 

 in front of nasal branches of premaxillse; they expand quite 

 suddenly in front and have concave lateral borders. 



Cheek-teeth normal ; «i^ usually with only two inner infolds. 



For external and skull measurements, see tables at end of 

 volume. 



