Vol. XXI, pp. 143-144 June 9, 1908 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



THREE NEW RODENTS FROM COLORADO. 

 BY C. HART MERRIAM. 



Merritt Cary, while engaged in a biological survey of Colo- 

 rado for the U. S. Biological Survey, collected several unde- 

 scribed species and subspecies of mammals. Three of these — a 

 small chipmunk and a gopher from San Luis Valley and a wood- 

 rat from the juniper foothills of the southeastern corner of the 

 State — are here described. The chipmunk I am naming for 

 Merritt Cary; the woodrat for Edward R. Warren, author of an 

 important annotated list of the Mammals of Colorado and first 

 collector of the present form. 



Eutamias minimus caryi subsp. nov. 



Type from Medano Hunch, San Luis Valley, Colorado. No. 150,740 

 U. S. National Museum, Biological Survey Collection, d" yg. ad. 

 Collected October 24, 1907, by Merritt Cary. Original No. 117*>. 



Characters. — Similar to minium* but paler and grayer. In fall pelage 

 ( late October) pale gray, most marked on neck and rump, and almost as 

 clear on inner pair of light stripes; outer pair of white stripes purer white 

 than in minimus; pale face stripes whitish in striking contrast with the 

 alternating dark stripes. 



Measurements. — Type: Total length, 194; tail vertebrae, 87; hind foot, 

 30. Average of 10 specimens from type locality: Total length, 194; tail 

 vertebra?, 89; hind foot, 30.2. 



Neotoma aibigula warreni subsp. nov. 



Type from Gaumes Ranch, northwest corner of Baca County, Colo- 

 rado (alt. 4600 ft.). No. 151,051 U. S. National Museum, Biological 

 Survey Collection, c? ad. Collected November 28, 1907, by Merritt Cary. 



Characters. — Color gray, as in the widely different iV. micropus, instead 

 of buffy ochraceous as in aibigula, to which it is most closely related; 

 cheeks gray (in aibigula strongly buffy or yellowish ochraceous); tail 

 20— PROC. Biol. Soc. Wash., Vol. XXI, 1908. (143) 



