SCIURID^ 77 



three dark and two light stripes on each side of the face, some of 

 these indistinct in some forms; top of head from nose to ears 

 gray or brown; ear striped, the front edge usually reddish, the 

 front half of the outer (convex) surface black or blackish, the 

 back half gray or white, usually in strong contrast; a gray or 

 white spot behind each ear, varying in distinctness; lower sur- 

 face of body light colored, white, gray or buffy; sides gray, more 

 or less tinged with buff or rust color, this tinge strongest in sum- 

 mer pelage; feet grayish or brownish; hairs of upper surface of 

 tail and its edges banded in contrasting colors, each hair being 

 blackish at base, then bufify or rusty, then black, then with a 

 longer or shorter tip of buff, gray or white; hairs of under sur- 

 face of tail dusky at base, the remainder yellowish ot reddish, 

 producing- a distinct light stripe the length of the tail, except 

 tip which is black. 



The summer moult takes place at the end of the breeding 

 season, earlier with males. The summer pelage is brighter than 

 that of winter and lasts about three months. In the spring the 

 colored tips to the hairs on the back may be so worn that the 

 stripes are indistinct or entirely worn ofif. 



Eutamias alpinus Merriam. (Alpine.) 



ALPINE CHIPMUNK. 



Very small and very pale in winter pelage; dark face stripes 

 narrow, pale rusty brown ; top of head gray ; ear markings pale ; 

 spot behind the ear dull white, diffused ; outer pair of light stripes 

 broad, white, inner pair pale gray or grayish white, middle back 

 stripe rusty brown the others fulvous, more rust colored in sum- 

 mer and the outer pair shading into- the fulvous oi the sides, 

 which are grayer in spring; tail rather long, broad, ochraceous 

 buff below, very narrowly bordered with black and broadly edged 

 with buff, above blackish shaded with yellowish or hoary, black 

 toward the tip, particularly below. 



Length about 185 mm. (7.30 inches) ; tail vertebrse 79 

 (3.10) ; hind foot 29 (1.15). 



