628 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
THOMOMYS TALPOIDES UMBRINUS, (Rich.) Coues. 
Southern Pocket Gopher. 
Gcomys wmbrinus, Ricu., F. B. A. i, 1829, 202; Rep. Brit. Assoc. for 1836, vi, 1537, 150. (“ Cadadaguios, 
Southwestern Louisiana”—more likely Texas or New Mexico.)—Warern., Charlesw. Mag. 
N. H. iii, 1839, 596, f.71 (skull).—DrKay, N. Y. Fn. 1842, 92. (Compiled from Richardson. )— 
Scninz, Syn. Mamm. ii, 1845, 137. (Compiled from Richardson.)—LEC., Proc. Acad. Nat. 
Sci. Phila. 1852, 162. (Compiled from Richardson.) 
Ascomys umbrinus, WAGN., Suppl. Schreb. iii, 1843, 389. (Cempiled.) 
Pscudostoma umbrinus, Aub. & Bacu., iii, 1854, 307. (Compiled from Richardson.) 
Geomys (Thomomys) wmbrinus, GIEB., Siiug. 1855, 5380. (Compiled from Richardson.) 
ry « 
Thomomys umbrinus, Barrp, M,N. A. 1857, 399 (redescribed from numerous New Mexican specimens).— 
Barb, U.S. Mex. B. Survey, ii, pt. ii, 1859, Mamm. 41.—Grrr., Cat. Bones Br. Mus. 1862, 228. 
Thomomys talpoides umbrinus, Cours, Proc. Phila. Acad. 1875, 137.—Cours, Powell’s Rep. Colorado R. 
1875, 261 (monograph).—Cours & Yarrow, Wheeler’s Rep, Expl. W.100 Merid. “ 1875” 
= 1876), 111 (New Mexico, Arizona, &c.). 
Geomys fulvus, Woopn., Proc. Acad. Nat, Sci. Phila. 1852, 201 (San Francisco Mountains, Arizona) ; Rep. 
Expl. Zani and Colorado RK. 1853, 51, pl. 5 (the same). 
Pseudostoma (Geomys) fulvus, AUD. & Bacu., Q. N. A. iii, 1854, 300. (Copied from Woodhouse.) 
Thomomys fulvus, Barrp, M. N. A. 1857, 402. (Describes Woodhonse’s type, and other specimens, from 
California.)—Barrp, U. S. Mex. Bound. Surv. ii, pt. ii, 1859, Mamm, 41.—KeEnwn., P. R. R. Rep. 
x, 1859, Whipple’s Route, Mamm. 14, pl. 12, f..2.—Cours, Am. Nat. i, 1857, 394 (habits),.— 
Covers, Proc. Acad. Nat. Sci. Phila. 1267, 135 (Fort Whipple, Arizona). - 
VanieraL cHars.—Averaging decidedly smaller than either of the fore- 
going. Length of head and body about six inches, rarely seven. Fore feet 
averaging decidedly less than the hind feet ; longest claw oftener under than 
over 0.40. Color variable, from a nearly uniform rich fawn-color all over, or 
even intense reddish-chestnut, to various tawny-brown shades, with or with- 
out a blackish dorsal area; belly merely a paler shade of the color of the 
upper parts, or much as described under budbivorus. (Occasionally quite 
gray, much as iu typical ¢a/poides ; sometimes lustrous coal-black all over.) 
Mouth-parts, and often whole face, blackish, except sometimes immediately 
around the lips, strongly contrasting with the white lining of the pouch, 
Tail usually more or less like the body. 
Haprrat.—Southern Colorado, Southern Utah and Southern Nevada, 
Western Texas, New Mexico, Arizona, and Lower California to Cape Saint 
Lucas. Southward extension into Mexico undetermined. 
No other form of the genus varies so much in color as this one. ‘The 
known variations are all given in the original memoir, and Drs. Coues and 
Yarrow have carefully described the normal or usual style of coloration in the 
Report above cited. 
