UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 12, No. 11, pp. 321-325, 1 text-figure January 20, 1915 



EUTAMIAS SONOMAE, A NEW CHIPMUNK 



FROM THE INNER NORTHERN COAST 



BELT OP CALIFORNIA 



BY 



JOSEPH GRTXXELL 

 (Contribution from the Museum of Vertebrate Zoology of the University of California 



The considerable series of chipmunks (genus En turn ins) in the 

 California Museum of Vertebrate Zoology, accumulated from the coast 

 district of California north of San Francisco Bay, consists of three 

 distinct species. Two of these, Eutamias hindsi (Gray) and Eutamias 

 townsi nili ochrogi nys Merriam, are already well known. The third is 

 herewith described, and the opportunity is taken to give the distri- 

 bution of all three species, as shown by the series of specimens at hand. 

 In this connection, there have been available for comparison, through 

 the courtesy of Mr. Henry W. Henshaw and Mr. Vernon Bailey, of 

 the United States Biological Survey, forty-six additional specimens of 

 Eutamias hindsi, from the national collection at Washington. Color 

 names are taken from Ridgway's (1912) Color Standards and Xonu n- 

 claturi . 



Eutamias sonomae, new species 

 Sonoma Chipmunk 



Type, — J adult, in full summer pelage ; no. 20825, Mus. Vert. Zool. ; 

 one mile west of Guerneville, Sonoma County, California; July 12. 

 1913 ; collected by J. and H. W. Grinnell ; orig. no. 2250. 



Diagnosis. — A member of the townsendi group of chipmunks (see 

 Merriam, 1897, p. 194) ; nearest like Eutamias hindsi, from which it 

 differs in greater size, relatively longer tail, longer ears, less deeply 

 ferruginous tone of coloration dorsally, whiter lower surface, the three 

 dorsal black stripes narrower, outermost light stripes whiter, post- 



