22 Bailey — New Species of Evotomys from British Columbia. 



ened with black tipped hairs; sides sepia gray tinged with pale buff; 

 spots over side glands of males whitish or dusky ; face clear dark gray ; 

 belly washed with whitish or rarely huffy ; ears dusky, scantily haired ; 

 tail bicolor, chestnut or dusky above with blackish tip, buffy below ; feet 

 soiled whitish or slightly dusky. In winter: dorsal area brighter, more 

 rufescent than in summer ; sides clearer gray. Young : darker than adults, 

 with dusky bellies, feet and tails. 



Cranial characters. — Skull short and wide with spreading zygomata and 

 very narrow nasals and rostrum ; nasals truncate posteriorly and ter- 

 minating even with ends of premaxillae ; audital bullae small and flat- 

 tened compared with those of occidentalis or saturatus, about equal to 

 those of wrangeli but wider and flatter ; incisors small and slender ; 

 molars small and crowded longitudinally ; anterior loop of second and 

 third upper molars usually indented; middle pair of triangles usually 

 confluent in each lower molar. 



Measurements of type specimen. — (Measured in flesh by E. A. Preble) : 

 total length, 135; tail vertebrae, 34; hind foot, 18. Average of 5 adults 

 from type locality: total length, 135; tail vertebrae, 36; hind foot, 18. 

 Skull of type: basal length, 21; nasals, 6.2; zygomatic breadth, 13.3; 

 mastoid breadth, 10.8 ; alveolar length of upper molar series, 4.9. 



Remarks. — The type series of 10 specimens shows only summer pelage 

 and young; a specimen taken at Agassiz, B. C, Dec. 6, is in nearly full 

 winter pelage. 



