FOUR NEW MAMMALS FROM THE CANADIAN ROCKIES 



By N. HOLLIS TF.R 



A small party from the Smithsonian Institution accompanied the 

 Alpine Club of Canada expedition to Jasper Park and the Mount 

 Robson region, during- the summer of 191 1. Among the mammals 

 collected are specimens of a new chipmunk, a new mantled ground- 

 squirrel and two new bats.' 



EUTAMIAS LUDIBUNDUS, sp. nov. 



Tyl^c from Yellowhead Lake," British Columbia ; 3700 feet. Cat. 

 No. 174225, \]. S. National Museum; skin and skull, female adult. 

 Collected August 29, 191 1. N. Hollister ; original No. 3987. 



General characters. — A large member of the ainamns group, nearest 

 related to Eutamias luteiventris, but with sides of quite a different 

 tint ; darker and more tawny, less bright and yellowish. Underparts 

 without the yellowish color of luteiventris; tail darker beneath. 



Color of type (post-breeding pelage).— Top of head, rump, and 

 upper surface of hind legs to heel, grizzled hair-brown. Five dark 

 stripes on back nearly pure black ; the two inner light stripes grayish ; 

 outer light stripes creamy-white, mixed with gray. Cheeks, sides, 

 shoulders, and fore legs, dark cinnamon; feet wood brown. Ears 

 blackish outside, brown inside ; a white area at base extends to tip of 

 ear in a broad band. Underparts whitish, without yellowish tint, but 

 with a faint suffusion of cinnamon-tawny on sides of middle of belly. 

 Tail above mixed black and dark buft' ; belov/ with central area russet, 

 bordered by bands of black and tawny-olive. 



^-^,,//._Like skull of Eiitaniias hitchrnfris, 1>ut averaging slightly 



larger. 



^Measurements of type.— Head and body, 126 mm.: tail vertebras, 

 96 ; hind foot, 34. Skull : Greatest length, 33.7 ; condylobasal length, 

 31 ; zygomatic breadth, 19.6; upper tooth row, 5.5. 



• Some new species of birds collected by this expedition are described by 

 J H Riley in Proc. Biol. Soc. Washington. Vol. 24, PP- 233-236. 191 1- 



•^This is the Cowdung Lake of many maps. It lies about six miles west of 

 the Alberta-British Columbia line, in Yellowhead Pass. 



Smithsonian Miscellaneous Collections, Vol. 56, No. 26 



