EUROPEAN REDBACKED MICE 95 



1867. HypudcFiis glarcolus Fatio, Les Campagnols du Bassin du Leman, p. 

 28 (part). 



Type locality. — Mount St. Gotthaid, Switzerland. 



JPaunal position. — This species is probably characteristic of tlie 

 middle and lower boreal zones; at lower elevations it is replaced by 

 E. hercyniciis hclveticjis. 



Geographic distribtition. — Evergreen forests of the Alps, except 

 in the lower valleys; exact limits of range not known. 



GcJieral characters. — Size large, skull of adults about 26 mm. in 

 greatest length, total length of adults 150-170, hind focTt 20 (18) or 

 more; ratio of tail vertebrae to total length 35-3S ; skull broad and 

 little ridged for muscular attachment, the zygomata weak and gradu- 

 ally flaring; colors dull. 



Color. — Sjnnmer pelage : Dorsal stripe well defined, extending 

 from forehead to rump. It is cinnamon rufous slightly varied with 

 pale broccoli-brown and inconspicuously darkened by a sprinkling of 

 black tipped hairs; the resulting color very nearly chestnut. Face, 

 cheeks, and sides light hair-brown fading to smoky gray on lower part 

 of sides. Rump light broccoli-brown tinged with red in median line 

 and forming a noticeable though not very strong contrast with color of 

 back. Whole ventral surface pale smoke-gray, faintly tinged with 

 yellowish along median line, the plumbeous bases of the hairs appear- 

 ing irregularly at surface. Feet dull white. A dark shade at inner 

 side of ankle. Sides of muzzle pale Isabella color. Ears thinly 

 haired, dull reddish. Tail bicolor, dark brown above, whitish below. 



Skull. — The skull of Evotomys nageri., while of the same size as 

 that of E. norvegicus.f is readily distinguishable by its relatively broader 

 braincase, more slender rostrum, shorter, broader interorbital region, 

 and lighter, less abruptly flaring zygomata. The latter flare so gradu- 

 ally that the greatest zygomatic breadth is at the posterior extremity of 

 the jugals, from which point the arches converge forward. Rostral 

 protuberances well developed, placed slightly further forward than in 

 E. norvegictis. Postorbital processes nearly obsolete, though slightly 

 more apparent than in E. rutihis. Nasals i^ounded posteriorly, ter- 

 minating in line with nasal branches of premaxillie. The dorsal pro- 

 file of the nasals is more rounded than in E. norvegictcs., and the con- 

 striction near middle is less abrupt. Braincase broad and so rounded 

 and slightly angular that the usual rectangular outline is much ob- 

 scured. Audital bulUe more globular than in E. norvegicus., the dif- 

 ference, however, appreciable on comparison only. 



Measurements of an adult skull (^) from Briinig, Switzerland: 



