EUTAMIAS. 25 



Geogr. Disl. State of Durango, Mexico. Range unknown. 



Genl. Char. Darker generally than either T. bulleri or T. durangcs. 

 Light dorsal stripes reddish not gray; rump and thighs much darker; 

 light face-stripes not so pure white; underparts mostly plumbeous on 

 sides and belly, not white, and middle of tail beneath chestnut, not 

 buff nor ochraceous-buff as in the other forms named. 



Color. Top of head iron-gray, black stripe from nose above eye 

 nearly to ear, and one from nose to eye becoming dark chestnut behind 

 eye to ear; yellowish white stripe from nose between the black ones 

 becoming a narrow line above eye and a broader one beneath eye; 

 broad chestnut stripe from nose across cheeks to beneath ear. Gray- 

 ish white patches behind ears; back of neck, shoulders, flanks, upper 

 side of arms from wrists and thighs to ankles dark gray tinged on 

 shoulders and flanks with yellowish; median black dorsal stripe from 

 head to root of tail bordered on either side with a rufous and gray 

 stripe, followed by a blackish chestnut stripe, succeeded by an outer- 

 most stripe of ochraceous, the outermost of all being dark chestnut. 

 There are thus five dark stripes and four lighter ones, the middle 

 pale ones being so tinged with red as to give the dorsal region a chest- 

 nut hue. Rump rufous; underparts from chin to and including breast 

 white, remainder plumbeous with a whitish line through center of 

 .abdomen. Tail above black edged with white, beneath chestnut 

 bordered with black and edged with white, tip black also edged with 

 white. Hands and feet whitish gray; ears externally black on anterior 

 half, gray on posterior. Ex type in Field Museum of Natural History. 



Measurements. Total length, 235; tail, 91; hind foot, 27; ear, 21. 

 Skull: Occipito-nasal length, 38; Hensel, 30; interorbital construc- 

 tion, 9; zygomatic width, 21 ; mastoid breadth, 1 7 ; palatal length, 16; 

 length of nasals, 12; width of rostrum posteriorly, 7; length of upper 

 molar series, 6; length of mandible to tip of incisors, 23; length of 

 lower molar series, 6. 



Eutamias pallidus cacodemus Gary. 



Eutamias pallidus cacodemus Gary, Proc. Biol. Soc. Wash., XIX, 

 1906, p. 89. 



Type locality. Sheep Mountain, Big Bad Lands, Fall River County, 

 South Dakota. 



Genl. Char. Size somewhat larger than E. pallidus Allen, color 

 paler. 



Color. Forehead gray; facial stripes pale buffy ochraceous; sides 

 and back of neck and flanks grayish white, slightly tinged with buff; 

 rump grayish white; median dorsal stripe blackish mixed with ochra- 

 ceous; lateral stripes pale ochraceous-buff, tinged with olive; middle 



