EUROPEAN REDBACKED MICE 89 



Skull relatively broad and audital bulhc relatively large ; 

 dorsal red area (in winter pelage) ill defined and 



much intermixed with gray E. h. hclvcticus 



Skull relatively narrow and audital bullae relatively small ; 

 dorsal red area never conspicuously mixed with gray. 

 Summer pelage clear russet slightly darkened by chest- 

 nut tipped hairs ; winter pelage more yellowish. 



E. h. hercynicus 



Summer pelage bister, mars brown, Vandyke brown, 



Prouts brown, mummy brown, etc., never clear 



russet ; winter pelage so far as known never 



strongly tinged with yellowish. 



Summer pelage with red dorsal area sharply defined 



and very narrow E. h. suecictis 



Summer pelage with red dorsal area broad, diffuse. 

 Hind foot usually more than 18 (17) ; ratio of 

 tail vertebras to total length about 36. 



E. h. rubidzcs 

 Hind foot usually less than iS (17); ratio of 

 tail vertebrsD to total length about 31. 



E. h. brittaniciis 



Subgenus CRASEOMYS Miller. 



EVOTOMYS RUFOCANUS (Sundevall). 



1846. HypiidcEus ricfocanus Sundevall, Oefversigt af Kongl. Vetenskaps. 



Akademiens Forhandlingar, Arg. 3, p. 122, May 13, 1846. 

 1897. EvotoJiiys rufocamis'Qwi.^Y, Proc. Biolog. Soc. Washington, xi, p. 122. 

 May 13, 1897. 



Type locality. — Lappmark, Sweden (specimens mentioned from 

 Altawaara, Karesuando, Lule, and Pite). 



Faimal positio7t. — Upper and middle boreal zones. 



Geographic distribution. — Northern Europe, south in the mountains 

 of Norway to Dovre.^ 



General characters. — Size large (hind foot, 20 (iS) or more; 

 greatest length of skull, 26) ; fur long and dense ; dorsal stripe narrow- 

 bright, and sharply contrasted with clear gray of sides. 



Color. — A specimen in fresh autvunnal pelage has a well defined 

 dorsal stripe of a color intermediate between the hazel and cinnamon 

 rufous of Ridgvvay,^ evenly but not conspicuously sprinkled with 

 black-tipped hairs. This stripe begins between the eyes and extends 



1 Collett, Nyt Mag. for Naturvidenskaberne, XXXVI, p. 2S0, March, 1S98. 

 2 Nomenclature of Colors, pi. IV, Nos. 12 and 16. 



