EODENTIA CASTOE1DAE CASTOE CANADENSIS. 



123 



Very numerous in parks and plains in and near the Rocky Mountains ; 

 westward to the plains of the Columbia. 



Observed in but two localities in Utah, viz, near Panquitch Lake and 

 Dog Valley, Middle Utah. Very numerous in Dog Valley and at Twin 

 Lakes, Colorado. 



As originally suggested by Professor Baird in describing " ffunnisoni", 

 this species proves, with further material examined by Mr. Allen, to be the 

 same as the cohtniliamis of Say, with which Iraehyura and lewisi are 

 synonymous. Specimens show a decided brick-red color above, and tinge 

 of the same below. 



Genus ARCTOMYS, Schreber. 



AEOTOMYS FLAVIVENTEE, And. & Bach. 

 Yellow-bellied Marmot. 



Arctomys Jlaviventer, AUD. & BACH., Proc. Acad. Nat. Sci. Phila., 1841, 99; Journ. 

 Acad. Nat, Sci. Phila., viii, 1842, 309; Quad. N. A., iii, 1853, ItiO, pi. 134. 

 BAIRD, Mamm. N. A., 1857, 343. 



Specimens. 



Rocky Mountains westward to the Pacific coast. Rather scarce in 

 Colorado, where, however, several specimens were secured. 



FAM. CASTOKIDAE. 



Genus CASTOR, L. 



OASTOE (FIBER var. ?) CANADENSIS, Kuhl. 

 American Bearer. 



Castor canadensis, KTJHL, Beitriige zur Zool., 1820, 64. FISCHER, Syu., 1829, 288. BD., 



M. N. A., 1857, 355. COUES, Am. Nat., i, 1867, 362. 

 Castor americamis, F. Cov., Hist, des Mamm., 1821. BRANDT, Beitriige Kennt. Siiugt. 



Euss., 1855, 64, pis. i, ii, iii. 



