RODENTIA— CASTOEIDAE— CASTOR CANADENSIS. 



123 



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

 westward to the plains of tlie 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 "gunnisoni", 

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

 same as the columhianus of Say, with which hrachyura and leivisi are 

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

 of the same below. 



Genus ARCTOMYS, Schreber. 



AROTOMYS FLAVIVENTER, Ami. & Bach. 



Yellow-bellied Marmot. 



Arctomys flaviventer, Aud. & BAcn., Proc. Acad. Nat. Sci. Phila., 1841, 99; Journ. 

 Acad. Nat, Sci. Phila., viii, 1S42, 309; Quad. N. A., iii, 1853, 100, pi. 134.— 

 Baird, Maumi. N. A., 1857, 313. 



Specimens. 



No. 



Name. 



Locality. 



Date. 



Collector. 



Remarks. 



36 



36 A 

 359 9 ad. 

 360 jun. 

 396 



A. flaviventer. .. 

 . . .do 



do 



June 16, 1873 

 do . 



Dr. J.T.Rothrock. 

 do 



H. W. Henshaw.. 

 do 



Dr. H. C. Yarrow. 



Skin and cranium. 



Do. 



Do. 

 In flesh. 

 Skin. 



do 



do 



do 



Fort Garland, Colo 



Rio Grande, Colo 



Santa Fe, N. Mex 



June 4, 1S73 

 June 16, 1S73 

 Aug., 1S74 



Rocky Mountains westward to the Pacific coast. Rather scarce in 

 Colorado, where, however, several specimens were secured. 



Fam. castoridae. 



Genus CASTOR, L. 

 CASTOR (FIBER var. 1) CANADENSIS, Kuhl. 



American Beaver. 



Castor canadensis, Kuul, Beitrage zur Z00L, 1820, 04. — Fischer, Syn., L829, 288. — Bd., 



M. N. A., 1S57, 355.— CoUES, Am. Nat.., i, 1S07, 362. 

 Castor americanus, F. Cuv., Hist, des Maumi., 1821,-^-Brandt, Beitrage Kennt. Siiugt. 



Riiss., 1855, 04, pis. i, ii, iii. 



