WESTERN CHIPMUNK 



forth in detail. Since the essential color pattern in each of the 

 principal groups does not vary appreciably, the differences 

 being mainly in shade or tone, the diagnosis given for each 

 form is condensed, it being assumed that the animal in 

 question conforms to the standard pattern unless otherwise 

 stated. 



The geographical ranges given are by no means compre- 

 hensive, for the reason stated above, but will serve as an 

 approximate key for distribution. 



Quadrivittatus Group 



^^^ ^?i5'^''v.^; ^«/g^^f° <^^VTnunk.~Eutamias quadrivittaius 

 quadrtvtttatus (Say). Plate XXIV 



As described above. Found in forests and brushy areas in 

 mountains of Colorado throughout a large part of the state 

 and southward into New Mexico, ranging^up to 90000? 

 10.000 feet elevation. s s up tu y,ooQ or 



Hopi Oai^mnx^.~Eutamias quadrivittatus hopiensis (Merriam) 

 Lighter and brighter colored than typical quadrivittaHci: 

 £f'^f "P^^.^^S^^.^estnut in color; median dark stripe with 

 faint sprinkling of black; facial stripes and ear patch whitish 



leShT.TnVhr^.'-r^^it' "^d^^-^t^ whitish. Total 

 iWw' P ^ '' ^^'^ ^5^^^^^' 3-5 inches; hind foot, 1.25 

 Zf.t'r. T"""^ lu southwestern Colorado south into New 

 Mexico and northern Arizona, north into southern Utah! 

 ranging up to above 7,000 feet elevation. Plate XXIV 

 Uinta Lhipmunk.—Eutamias umbrinus (Allen) 

 Resembling typical quadrivittatus but larger and outer darker 

 stripes reduced or obsolete; color much as in typical S- 

 rzvittatus Total length, 10 inches; tail vertebr^^ 4 o 

 mches; hmd foot, 1.3 inches. Found in Wasatch and 

 Umta Mountains of Utah 'i^citLii ana 



Beaver Mountain Chipmunk.— E^^tomm^ adsitus Allen 



Sm So'inTy,Ttr"- ""^""^ '" ^^""^^ Mountains, Mil- 



^''^Xwdl'^ Cliipmunk.-£z,tomm. ruficatidus ruficaudus 

 Similar to umbrinus but more rufescent; head and face with 



unde^r'^^J; St I'f f^"P^' ^""^ ^^^ P^^^^ g^^^^ish white; 

 underside of tail dark orange-rufous. Total length 11 

 inches; teil vertebras, 4.75 inches; hind foot, 1.36 inches 

 Montana. ^^'^ ''^^°" ^"^ Bitterroot Mountains,' 



^"^""Hower^ Chipmunk.-£.,/am.-a^ ruficaudus simulans 



Resembling typical ruficaudus, but paler on sides, under- 

 surface, and edging of tail. Total length, 9.9 inches tSl 

 vertebra, 4.7 mches; hind foot, 1.3 inches. ^Foundll the 

 ^ 227 



