VOL. XI, PP. 189-212 JULY 1, 1897 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOTES ON THE CHIPMUNKS OF THE GENUS EUTA- 

 MIAS OCCURRING WEST OF THE EAST BASE 

 OF THE CASCADE-SIERRA SYSTEM, WITH 

 DESCRIPTIONS OF NEW FORMS. ' 



BY C. HART MERRIAM. 



Owing to the unfortunate delay in bringing out the first volume 

 of the Death Valley Expedition report, it is thought desirable 

 to publish at once certain descriptions and remarks on Chip 

 munks that were written for this report in 1893. With these 

 have been incorporated additional notes, and descriptions of two 

 new species, obtained during subsequent explorations by the 

 Biological Survey, both in the area covered by the original ex 

 pedition 'and in adjacent territory on the north. 



It will be observed that the name Eutamias, proposed by 

 Trouessart in 1880* as a subgenus of Tamias, is here adopted as 

 a full genus. This is because of the conviction that the super 

 ficial resemblance between the two groups is an accidental 

 parallelism in no way indicative of affinity. In fact, the two 

 groups, if my notion of their relationships is correct, had very 

 different ancestors -Tam-ia* being an offshoot from the ground 



*Catal. Mamm. Viv. et Foss., Rongeurs, 86, 1880. As originally pro 

 posed the name included four very different animals: asiaticus Gm., 

 harrisi Aud. & Bach., lateralls Say, and Ixvidens Cope (fossil). The fossil 

 Ixoidem I have not seen, but harrisi was placed by me in Ammosper- 

 mophilm in 1892, and lateralis is the type of a very distinct subgenus of 

 Spennopldlus, which I here name CaUospermophilus. The type of Eutamiav 

 was fixed on Tamias asiaticus Gm. by Allen in 1894 (Proc. Linn. Soc. N. Y. , 

 p. 26, July, 1894). 



45 BIOL Soc. WASH., VOL. XI, 1897 (189) 



