Neiv Species and Subspecies of Voles. 89 



base of incisors ; audital bullse small ; incisive foramina short ; first upper 

 molar usually with a posterior lobe on inner side; molar pattern other 

 wise as in penmylvanicus. The skull is readily distinguishable from either 

 driimmondi or fontigenus by the protruding incisors and small audital 

 bulla). 



Measurements. Type, $ ad., measured from alcohol : Total length 139 ; 

 tail vertebrae 39 ; hind foot 20. Average of 7 specimens from type local 

 ity, measured from alcohol: Total length 137; tail vertebrae 37; hind 

 foot 19. Skull of type: Basal length 24.3 ; nasals 6.7 ; zygomatic breadth 

 14.4 ; mastoid breadth 11 ; alveolar length of upper molar series 6.2. 



Miciotus californicus vallicola subsp. nov. 



Type from Lone Pine, Inyo Co., California. No. fffff, $ ad., U. S. 

 Nat. Mus., Biological Survey Coll. Collected Dec. 23, 1890, by E. W. 

 Nelson. Orig. No. 149. 



General characters. Similar to M. californicus but averaging slightly 

 larger and darker ; proportions the same. 



Color. Summer pelage : Upper parts dull sepia, darkened by black 

 tipped hairs darker and with less yellowish suffusion than in californicus; 

 below dull grayish or smoky plumbeous ; feet dusky ; tail bicolor, grayish 

 below; blackish above. Winter pelage : darker throughout, with black 

 hairs of back longer and more conspicuous. 



Cranial characters. Skull like that of californicus, but audital bull^e usu 

 ally smaller; occiput more abruptly truncate; nasals reaching nearer to 

 tips of premaxillse ; middle upper molar with lobe at base of 4th triangle 

 often developed into a loop. 



Measurements. Type, 9 ad.: Total length 200 ; tail vertebra 57 ; hind 

 foot 23. Average of 7 specimens from type locality: Total length 188; 

 tail vertebra 56 ; hind foot 23. Skull of type: Basal length, 29.4; nasals 

 9.5; zygomatic breadth 17.6; mastoid breadth 13.4; alveolar length of 

 upper molar series 7.4. 



Microtus pinetorum nemoralis subsp. nov. 



Type from Stilwell (Boston Mts.), Indian Territory, No. 87246, 9 ad., 

 U. S. Nat. Museum, Biological Survey Coll. Collected April 7, 1897, by 

 J. Alden Loring. Orig. No. 3905. 



General characters. Size, largest of the subgeims Pitymys in the United 

 States ; ears large ; fur long and coarse ; colors duller than in pinetorum, 

 but not so dark as in scalopsoides. 



Color. Upper parts dull chestnut, slightly lined with blackish tipped 

 hairs on back and rump, becoming paler on sides ; belly washed with 

 cinnamon rufous over the plumbeous underfur; tail indistinctly bicolor, 

 agreeing with dorsal and ventral colors of body ; feet thinly clothed with 

 pale buffy or sometimes dusky hairs. 



Cranial characters. Skull large and relatively elongated ; supraoccipital 

 sloping ; interparietal narrow ; mastoids and au.dital bulke large and pro- 



