Meirldiii — A^ew ChipnniiiLs from Colorado and Arizona. 165 



Charoclers. — Similar to ainccmiK but lacking the distinct black on anterior 

 two-thirds of posterior aspect of ear; lower dark cheek stripe and stripe be- 

 tween eye and ear usually narrower; tail longer; upper side of tail more 

 strongly fulvous, the underlying black less marked ; undersi<le of tail with 

 subniarginal l)lack band narrower; median dorsal strijte lilacker and more 

 pronounced on back of neck and occiput ; outer lateral strijte more pro- 

 nounced. 



In the late fall pelage, which lasts until the breeding season, the rump 

 and middle ])air of dorsal light bands are gray, as in ariHi'inis, but in post- 

 breeding pelage the rump is more olivaceous, more or less grizzled with 

 fulvous; the miildle pair of pale dorsal stripes are less gray, and the 

 shoulders and anterior part of back more deeply and extensively fulvous. 

 Some specimens in postbreeding pelage have the underparts suffused with 

 yellowisli and fulvous as in the larger iuteirevtris. 



}f<'asjtrti)t<'utK (taken in tlesh). — Type specimen : Total length, 200; tail 

 vertebras, 93 ; hind foot, 31. Average of 10 specimens from Estes Park, Colo- 

 rado: Total length, 199 ; tail vertebra?, 92; hind foot, 31. 



Eutamias hopiensis sp. nov. 



Ty/jf from Keam Canyon, Painted Desert, Arizona. No. 67,768, 9 adult, 

 U. S. National Museum, Biological Survey Collection. July 27, 1894. A. K. 

 Fisher. Original No. 1688. 



Characters. — Size medium or rather large, as in quadrivitlatus ; general 

 color pale golden fulvous, particularly in winter pelage when even the dark 

 stripes are only slightly deeper fulvous than the flanks; head and rump 

 pale. 



CoZor.— Top of head pale buffygray,slightiy darker in postbreeding pelage. 

 rump, pale grizzled ochraceous gray, only slightly darker in postbreeding 

 pelage ; outer pair of light stripes white ; inner pair of light stripes grizzled 

 white and gray, sometimes tinged with buffy ; dark dorsal stripes in winter 

 bright fulvous, in summer with black centers; tail deep rufous, the under- 

 lying black showing through from above; under side with black subniarg- 

 inal band rather narrow. 



Measurements. — Average of 10 specimens from tyjje locality measured in 

 flesh : Total length, 224 ; tail vertebra?, 101 ; hind foot, 33.5. 



Remarks. — ^Dr. Fisher collected a fine series of this remarkably handsome 

 chipmunk in the juniper and pinyon belt at Keam Canyon, where it was 

 living among rocks and cliffs. He tells me that its name in the language 

 of the Hopi for "Moki") Indians is Knin'ua. The Biological Survey has 

 specimens also from Bluff City, Utah, collected by J. Alden Loring. The 

 species has been previously referred to gracilis— a. very difterent animal and 

 one which proves to be hardly distinguishable from true quadrivittatus of 

 Colorado. 



