IH 



638 MONOOBAPHS OF KORTn AMEBIOAN BODENTIA. 



TIIOMOMYS TALPOIDES UMBRINUS, (Rich.) Coue* 

 Boathera Fockel fi«M«r> 



Ocomf umMnut, Ricn., F. B. A. i, 1830, 909; Bap. BriL Aaoe. for 1836, vi. 1KI7, IM). (<• CMUdaRaliw, 



Bouthweatern LaninisuB"— mora likeljr Tezu or New Mexloo.)— WikTKHii., Charleaw. Hug. 



N. II. ill, IKIO, I^, r. 71 (tkull).— DbKat, N. T. Fu. 1849, 09. (VomplM (Vam KioliMtUon.)— 



BciiiKZ, Byn. Hamm. il, IfUti, 137. (Compiled from Rlobardaon.)— LbC., !*«». Aoiid. Nat. 



Sol. Pbila. laat. Ifri. (Compiled from Rlobudaoo.) 

 Jieomf MiMaM, Waon., Suppl. Hcbrob. iii, 1843, 380. (Compiled.) 

 i'tuiiHloma umMnu, AuD. A. Bach., iii, 18M, 307. (Compiled from BlobiurdaoD.) 

 OroMft ( nomamt*) tmtrtmmt, OiKB., Sling. ISOK, 530. (Complied from Biohardaoo.) 

 T/koMOMyt miMaiM, Baird, U. N. A. 18Ei7, 309 (redeaoribed fknm Dnmeroua New MexioMi apeoimena). — 



Bairu, U. B. Hex. B. Survey, ii, pt. il, ISTiO, Uamm. 41.— Oihr., Cat. Boaea Br. Mna. 1809,998. 

 Tkoaioaiy* latpoUt$ umtriuat, Cocu, Proo. Ptaiia. Aead. 1875, 137.— CouRa, Powoll'a Rep. Colomdo R. 



1875, 961 (monognpb).-CouRa A. Yarrow, Wbeeler'a B«p. Ezpl.W.lOO Uerid. "187I>" 



(=. 1876), 111 (New Hexioo, Arizona, &o.). 

 Onmya /Wlvtu, Wiiodii., Pruc. Acad. Nat. Ho). Pbila. 1859, 901 (Ban Franoiaco UoantaiDa, Ariiooa) ; Bep. 



Expi. ZiiOi and Colorado R. 18S3, Al, pi. G (tbe same). 

 rtudotloma (Omrngt) fnhtu, AuD. &, Dach., Q. N. A. Iii, 18S4, 300. (Copied ttom Woodboaaa.) 

 nomamf /Wfr«>, Baird, M. N. A. 18S7, 409. (Deacribea Woodbonae'a type, and olber apeclmeii*, from 



Calir»rDia.)-BAiRO, U. 8. Hex. Bonnd. Snrv. 11, pt. 11, 1H&9, Momm. 41.— Krnm., P. R. K. Rep. 



X, 18r.O, Whipple'* Ronte, Hamm. 14, pi. 19, f. 9.— CouES, Am. Nat. 1, 18li7, 3!M (bablU).— 



COUKS, Proo. Acad. Nat. Boi. PblU. 18G7, 135 (Fort Whipple, Arizona). 



Varietal chabb.-'— Averaging decidedly emaller than either of the fore- 

 going. Length of head and bo<1y about six inches, rarely seven. Fore feet 

 averaging decidedly less than the hind feet ; longest cluw oilencr 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 bulbivorus. (Occasionally quite 

 gray, much as in typical talpoidet; 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. 



Habitat. — 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. Tlie 

 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 

 Keport above cited. \ 



