Order vi. Rodenfia, 



Family I. SciiiricUe. 



Subfamily I. Sciurinse. 

 Genus 51. Tamias. 



173a. T<iiiiins itiiKi'ims operarhis (Merriam). 



Eutamias aunvnits operarius Merr., Proc. Biol. Soc. Wash., xviu, 



1905, p. 164. 

 BUSY CHIPMUNK. 



Type locality. Gold Hill, Colorado. Altitude, 7,400 feet. 



Genl. Char. "Similar to amaenus, but lacking the black on 

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

 eye and ear usually narrower; tail longer, the upper side more strongly 

 fulvous ; black beneath less marked ; submarginal black band beneath 

 narrower; median dorsal stripe blacker and more pronounced on back 

 of neck and occiput ; outer lateral stripe more pronounced." (Mer- 

 riam, 1. c.) 



Fall and Post-breeding Pelage. Middle pair of light dorsal stripes 

 and rump gray; in post-breeding pelage, the dorsal stripes are less 

 gray, the rump more olivaceous, and the shoulders and anterior part 

 of back more fulvous. "Some specimens have the under parts suf- 

 fused with yellowish and fulvous, as in the larger luteiventris ." 



Measurements. Total length, 200; tail vertebrae, 93 ; hind foot, 31. 



177aa. Tamias hopiensis (Merriam). 



Entamias hopiensis Merr., Proc. Biol. Soc. Wash., xviu, 1905, 



p. 165. 

 HOPI CHIPMUNK. 



Type locality. Keam Canon, Painted Desert, Arizona. 



Genl. Char. Size medium; general color pale golden fulvous; 

 head and rump pale. 



Color. Head above pale buffy gray; rump pale grizzled ochra- 

 ceous gray; outer dorsal stripes white; inner 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, narrow black submarginal band beneath. 



Measurements. Total length, 224; tail vertebrae, 101 ; hind foot, 

 33-5- 



541 



