The CJiipiiiKiiks of the Genxs Entainias. 207 



Pod-brcediag pdage : uj)pef parts fulvous, Ijrightest and richest on sides, 

 becoming paler and duller on rump ; dark dorsal stripes much redder than 

 in winter pelage, the median one only showing any clear black ; inner 

 pair of light stripes also suffused with fulvous; outer pair graj'ish ; face 

 (sometimes including nose), anterior and inner pait of ears, under parts, 

 and fore and hintl feet strongly suffused with fulvous. 



Measurements. — Ti/pe specimen: total length, 2G1 ; tail vertebrjB, llo; 

 hind foot, 38. Average of 8 specimens from type locality: total length, 

 26.'5; tail vertebne, 115.5; hind foot, 38.5. Average of 18 specimens from 

 Cazadero and Gualala, California: total length, 2()0.5; tail vertebra, 

 111.6; hind foot, 38.5. 



Remarks. — In post-breeding pelage E. nchrogemjs assumes a fulvous 

 pelage, which while differing conspicuously from the corresponding pelage 

 oihindsi is very much more like hindsi in worm spring pelage. In fact, 

 except for the dates on the labels it would be hard to tell from the color 

 whether certain specimens were the redwood Chipmunk in post-breeding 

 l)elage or hindsi in spring pelage. Of course the post-breeding pelage is 

 fresher and less worn, and carries with it a salmon -fulvous suffusion on 

 the belly which is much less extensive in hindsi. In some specimens of 

 }iindsi in summer pelage the fulvous of the sides washes across the belly, 

 but this wash is much less extensive and less intense than in the redwood 

 animal. There is also a difference in the color of the upper parts, although 

 this is sometimes hard to be sure of. The post aviricular patches are 

 whiter than in Jiindsi, and the inner pair of light stripes are more strongly 

 suffused with yellowish. All of the stripes are shorter posteriorly, so 

 that the unmarked area of the rump is more extensive than in hindsi. 



Contrasting specimens in corresponding pelage, there is no difficulty in 

 separating the two animals. E. hindsi in summer pelage is a very red 

 Chii)munk, and the upper parts, particularly from the back of the neck 

 to the lumbar region, are very bi'iglit rich fulvous. In hindsi, moreover, 

 in post-l)reeding pelage the three dorsal dark stripes are hUick, and even 

 the external lateral stripe is distinctly marked, though washed with 

 fulvous. In the redwood animal the dark stripes are never black, and 

 the external lateral stripe is nearly obsolete. 



Eutamias oreocetes sp. nov. Timber-line Chipmunk. 



Tijpe from timber-line near Summit, Teton Mts. [main range Rocky 

 Mts.], Montana. No. 72468, ? ad. (nursing). U. S. Xat. Mus., Biological 

 Survey Coll. Collected June 14, 1895, by Vernon Bailey. Grig. No. 5024. 



General characters. -In spi'ing pelage similar in color and general ap- 

 pearance to Eutamias minimus and (dpinas, which very distinct species 

 bear a surprisingly close seperficial resemblance to one another ; dorsal 

 stripe longer, broader, and blacker than in either mini)nas or alpinus, in 

 this resj)ect resembling the larger ajjinis in spring pelage. 



Color. — -Type in spring pelage [:= left-over winter ]»elage] : upper parts 

 gray with a buffy yellowish suffusion on flanks and on side of neck just 

 in front of foreleg; post-auricular spots whitish ; top of head grizzled 



