76 MAMMALS OF UTAH 



belly washed with white; feet dull grayish; tail bicolor, 

 blackish above, grayish below. Young : Darker than adult, 

 but not black backed as in nevadensis. (Bailey.) 



Distribution — The type locality of this species is St. 

 George, Utah, where it inhabits the tule marshes along the 

 banks of the Virgin river. Its true extent is not known. 



SA WATCH VOLE 



MICROTUS PENNSYLVANICUS MODESTUS (Baird) 



Arvicola modesta Baird, Mamm. N. Am., 535-536, 1857. 

 Arvicola insperatus Allen, Bui. Am. Mus. Nat. Hist. 347, 1894 

 (Custer, S. Dak.). 



Description — Summer pelage : Upper parts dull ochra- 

 ceous, darkened with black-tipped hairs; belly washed with 

 soiled whitish, smoky gray or pale cinnamon; feet plum- 

 beous; tail indistinctly bicolor, blackish above, dull grayish 

 below. Winter pelage : Much darkened above by long black 

 hairs, especially early in the season, later becoming paler 

 than in summer as the under-fur grows longer; belly heav- 

 ily washed with creamy white ; feet paler ; tail more sharply 

 bicolor. Young : Slightly less blackish than in pennsylvani- 

 cus. (Bailey.) 



Distribution — Mountainous region from New Mexico to 

 British Columbia. Specimens have been taken at Ogden and 

 Salt Lake City, Utah. 



Habits — Cary found these meadow mice feeding exten- 

 sively upon the blossoms and leaves of the false Solomon's 

 Seal (Vagnera stellata) and fragments of the blossoms of a 

 species of Senecio. 



DWARF VOLE 



MICROTUS NANUS (Merriam) 



Arvicola nanus Merriam, N. A. F. No. 5, 62-63, pi. II, fiffs. 5 

 and 6, July 30, 1891. 



Description — Summer pelage: Upper parts uniformly 

 grizzled gray mixed with sepia and blackish hairs; belly 

 washed with white ; feet grayish or plumbeous ; tail bicolor, 



