38 MAMMALS OF UTAH 



white ; stripes indistincf ; median stripe blackish, inner dark 

 pair grizzled, mixed blackish" and rusty rufous, outer dark 

 pair practically obsolete inner pair of light 'stripes grayish 

 white, quite wide; outer pair also grayish white, but nar- 

 row ; indistinct grayish white post-auricular spot ; posterior 

 half of ear grayish white; light facial stripes whitish; a 

 rusty stripe through eye; upper and lower facial stripes 

 mixed blackish and rufous, the latter stripe rather indi- 

 stinct; top of head mixed grayish and rusty; upper sur- 

 face of tail blackish, fringed with white-tipped hairs ; under 

 surface rufous, bordered with blackish. Total length 8.75; 

 tail vert. 3.5 ; hind foot, 1.3. (Warren.) 



Distribution — The type locality of this species is Ogden, 

 Utah, though its general range extends throughout north- 

 ern Utah and northwestern Nevada, throughout Arizona to 

 New Mexico. Gary says that Utahensis has not been taken 

 much east of Provo in Utah. It is an upper Sonoran form 

 and probably ranges eastward along the southern foothills 

 of Uinta mountains, entering Colorado in the region of the 

 Yampa plateau, south of Bear River. Future work in north- 

 eastern Utah will determine whether there is a continuity 

 of range, or the Colorado colony is entirely isolated. 



Habits — These chipmunks are very wild. Their fa- 

 vorite feeding time is in early morning and just before 

 sunset, when they may be found usually in the tops of ju- 

 nipers, busily feasting upon the berries. When frightened 

 they utter a series of high-pitched notes, and after a hasty 

 descent to the ground flee precipitately, rarely stopping 

 within sight. The bushy tail is very prominent and gives 

 the animal the appearance of a small squirrel, and this re- 

 semblance is heightened by the ease and rapidity with 

 which it climbs trees and keeps on the opposite side from 

 the observer. The seeds of juniper berry appear to be the 

 chief food. (Cary.) 



DARK CHIPMUNK 



TAMIAS UMBRINUS (Allen) 



Tamias umbrinus Allen, Bull. Am. Mus. Nat. Hist. N. Y., 1890, 

 p. 96. 



Description — Larger than T. quadrivittatus, colors 

 duller, and outer dark stripe obsolete. Autumn pelage — 

 Above yellowish brown gray; flanks dull yellowish brown; 



