RODENTJA GEOMYIDJE GEOM YS CASTANOPS. 



Ill 



.admixture of lighter color ; while the sides show a decided fulvous stripe. 

 But these specimens exhibit the fore leg colored quite to the wrist, and we 

 are inclined to attribute the dark color to their immaturity. For the pres- 

 ent, then, we provisionally assign them to P. monticola with a mark of doubt. 

 The species is one with which we are still imperfectly acquainted, as may be 

 seen on reference to Dr. Coues's memoir on the subject above cited. 



Specimens. 



FAM. GEOMYIDAE. 



Genus GEOMYS, Raf. 



GEOMYS CASTANOPS, (Bd.) LeC. 



Chestnut-laced Gopher. 



Pseudostoma castanops, BD., Stansbury's Rep. Expl. Great Salt Lake, 1852, 313. ATJD. 



& BACH., Q. N. A., iii, 1854, 304. 

 Geomys castanops, LEC., Proc. Acad. Nat. Sci. Phila., 1852, 163. BD., M. N. A., 1857, 



384; P. R, R. Rep., x, 1859, Gunnison's & Beckwith's Route, mamm., 8, pi. 



10, f. 2. COUES, Powell's Expl. Colorado R., 1875, 233 (monographic). 

 Geomys clarfa'i, BAIBD, Proc. Acad. Nat. Sci. Pbila., 1855, 232 ; M. N. A., 1857, 383, pi. 



50, f. 1 a-g; U. S. Mex. B. Surv.. ii, pt. ii, 1859, p. . KENJNERLY, P. R. 



R. Rep., x, 1859, Whipple's Route, mamm., 13. 



The original specimen of this species was taken near Bent's Fort, New 

 Mexico. Dr. Coues has lately shown that the supposed G. clarkii is the 

 same species. 



Genus THOMOMYS, Maxim. 



THOMOMYS TALPOIDES UMBRINUS, (Rich.) Coues. 

 Black-laced Gopher. 



Geomys umlrinus, RICH., F. B. A., i, 1829, 202; Rep. Brit. Assoc., v, 1S3G (1837), 157. 

 WATEEU., -Charlesw. Mag., iii, 1839, 59G, f. 71. DEKAY, N. Y. Fn., 1842, 

 92. SCHINZ, Syn. Mamm., ii, 1845, 137. LECONTE, Proc. Acad. Nat. Sci. 

 Phila., 1852, 102. 



Ascomys nmlrimis, WAGN., Suppl. Schreb., iv, 1843, 389. 



