Tamias. 111. Syst. Mamm., 1811, p. 830. Type Sciurus striatus, Linn. 



Tcnotis, Rafin. Am. Month. Mag., 1817, i, p. 362. 



Eutamias, Trouess. Le Nat., 1880, p. 86. 



Tail short, not bushy, narrow, cheek pouches large ; ears medium 

 without tufts. Skull narrow anteriorly, superior outline convex, 

 postorbital processes slender, directed backward and downward ; 

 anteorbital foramen oval ; zygomata expanded and depressed anterior- 

 ly; upper premolars either two or one. 



A. Eutamias. 

 Skull with superior outline highest over parietals ; orbital fora- 

 men a narrow, oval, slit-like opening ; rostrum compressed ; nasals 

 short, narrowing only slightlj' posteriorly ; pterygoid fossa long and 

 wider; audital bullae large. 



Fig. 16. Tamias (Eutamias) dorsalis. 

 No. 83g Field Columbian Museum Coll. 



Upper tooth kow. Lower tooth row 



Enlarged 4 times. Enlarged 4 times. 



81. dorsalis. {Tamias), Baird, Proc. Acad. Nat. Scien. Phil., 1855, 



P- 332- 



qiiadrivitatus pallidus, Coues & Yarr. in Wheeler's Rep. Geogr. 

 Expl. & Surv. West of 100 Merid., 1876, v, p. 118. 



Type locality. Fort Webster, New Mexico. 



Geogr. Distr. Northern Utah to Mexico ; west to Sierra Nevada 

 Mountains ; east to the Mimbres in New Mexico. 



Genl. Char. Single dorsal stripe alone conspicuous. 



Color. Upper parts hoaiy mixed with rusty and brown ; flanks 



