RODENTIA— MURIB\E— HESPEROMYS AMER10ANUS. 



103 



Arvicola emmonsii, DeKay, Rep. Quad. Mass., 1840, 01. 

 Musculus leucopus, Rap., Am. Month. Mag., iii, ISIS, 446. 

 Mus leucopus, Desm., Mauim., ii, 1822, 307; au<l of authors. 

 Hesperomys leucopus. LeC, P. A. N. S. P., vi, 1S52, 413 ; and of authors. 

 Hesperomys (Vesperimus) leucopus, Coues, Proc. Acad. Nat. Sci. Phila., 1874, 17S. 

 Hesperomys maniculatus, WAGN., Wieg. Arch., ii, 1S43, 141, and ii, 1845, 148; Abh. 



Akad. Wissen., v, 1S4S, 31G (Labrador). 

 Hesperomys polionotus, Wagn., Wieg. Arch., ii, 1S43, 52 (Georgia). 

 Hesperomys campestris, LeC, P. A. N. S. P., vi, 1853, 413 (New Jersey). 

 Hesperomys texanus, Woodh., P. A. N. S. P., vi, 1853, 242 (Texas). 

 Hesperomys cognatus, LeC, P. A. N. S. P., vii, 1855, 442 (Southern States). 

 Hesperomys gracilis, LeC, P. A. N. S. P., vii, 1855, 442 (Northwestern States). 

 Hesperomys austerus, Bd., P. A. N. S. P., vii, 1S55, 330 (Washington Territory). 

 Hesperomys boylii, Bd., P. A. N. S. P., vii, 1855, 335 (California). 

 Hesperomys gambeli, Bd., M. N. A., 1857, 404 (Pacific coast, United States). 

 ? Hesperomys indianus, Maxim., Arch. f. Naturg., xviii, 1802, 111 (fide Allen). 



Note. — The above synonymy is exclusive of the several geographical varieties of 

 this species which may be recognized. 



IlAB. — North America generally. 



Yar. SONOKIENSIS. 

 ?Mws leucopus, Rich., Zool. Journ., iii, 1818, and F. B.-A., i, 1829, 142. 

 Hesperomys sonoriensis, LeC, P. A. N. S. P., vi, 1853, 413 (Sonora). 

 Hesperomys sonoriensis var. nebrascensis, Bd., M. N. A., 402, in text. 

 Hesperomys (Vesperimus) leucopus sonoriensis, Coues, Proc. Acad. Nat. Sci. Phila., 

 1874, 179. 

 Hab. — Interior of North America, west of the Mississippi, from Arctic regions to 

 Mexico (usually occupying this range to the exclusion of typical americamts, but some- 

 times associated with it). This is the ordinary species of these regions, as shown by 

 the following series of specimens : 



Specimens. 



No. 



Name. 



Locality. 



Date. 



Collector. 



Remarks. 



S7 



H. leu. var. sonor. 



Twin Lakes, Colo 



June II, 



1S73 



Di 



. J. T. Rothrock 



In flesh. 



90 



do 



do 



June 12, 



1S73 





..do 



Do. 



S 9 



ss 

 ISSC5 



li 2 



do 



do 



June 13, 

 do . 



1S73 







Do. 



do 



. .do 





. . do 



Do. 

 Do. 



..do 



do 



Sept. 3, 

 June 5, 



1S73 

 1S73 





..do 



do 



Fort Garland, Colo 



H. 



W. Henshaw .... 



Do. 



a 

 3 6 4 



do 



do 



do . 



1873 



... 



..do 



..do 



Do. 

 Do. 



do 



Rio Grande, Colo 



June 16, 



75 



do 



White Mts., Arizona 



Aug., 



1S73 



Di 



. C. G. Newberry. 



Do. 



G 



do 





do . 





II 





Do. 



577 

 J 

 502 



do 



do 



do . 







. do 



Do. 



do 



do 



Aug. 21, 



1S74 

 1S73 





..do 



Do. 



do 



El Moro, N. Mex 



July, 





_.do 



Do. 





