212 Mcrriam — The Chipmimks oj the Genus Eutamms. 



of Sevier Lake and the mining camp of Frisco, in southwestern 

 Utah. 



The Cliff Chipmunk (including both E. c/or-sr/i/s and subspecies 

 ntaJiensis) is restricted so fixr as known to the Upper Sonoran and 

 Transition Zones along the western and southern part of the 

 Great Colorado Plateau and its outliers, where it ranges from the 

 foot of the Wasatch Mountains in northeastern Utah southward 

 as far as the Plateau extends in Arizona, and thence easterly to 

 the Mimhres in the Pihos Altos Mountains in western New 

 Mexico. A[)parently the range of utaheasis is much more ex- 

 tensive than that of the typical form, since s})ecimens from east- 

 ern Arizona are intergrades, and those from western Arizona and 

 southeastern Nevada are nearly typical 'idahensis. 



The name ' Gila Chipmunk,' commonly applied to E. dorsnlis 

 is a glaring misnomer, since it implies that the species inhabits 

 the valley of the Gila, one of the hottest and most arid of the 

 torrid Lower Sonoran Deserts. As a matter of fact it never 

 enters this desert at all, but lives in a higher zone, under widely 

 different conditions. The early use of the name Gila Chipmunk 

 is due to the circumstance that the original specimen came from 

 the mountains near the headwaters of the Gila River. Since the 

 species always lives among rocks, and its favorite haunts are 

 canons and the faces of precipitous cliffs, the appropriate name 

 Clif Chipmunk is here given it in place of the old misleading one. 



