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Show COUES ON GEOMYS AND THOMOMYS - T. BULBIVORUS. 259 TJiomomys Mice, LESS., Nouv. Man. R. Aniin. 1842, 119. (Compiled.)-BAIRD, Proc. Acad. Nat. Sci. Phila. 1855, 335. (Subsequently identified the same with bulbivorus.) Geomys fuliginosus, SCHINZ, Syn. Mamni. ii, 1845, 136. (Based on douglasi; name altered for no good reason.) Thomomys laticeps, BAIRD, Proc. Acad. Nat. Sci. Phila. 1855, 335; M. N. A. 1857, 392. (Hnmboldt Bay.)- KENN., P. R. R. Rep. x, 1859, Whipple's Route, Mamm. 13, pi. 12, f. 1 (by error marked "2" in text). (Same as the foregoing.) Geomys douglasii, RICH., F. B. A. i, 1829, 200, pi. 18 C, ff. 1-6 (skull); Zool. Voy. Blossom, 1839, 9. (Near mouth of Columbia; Fort Vancouver.)-LECONTE, Proc. Acad. Nat. Sci. Phila. 1852, 162. (Compiled from Richardson.) Geomys douglasi, DEKAY, N. Y. Fn. 1842, 92. (Compiled from Richardson.) Ascomys douglasii, WAGN., Suppl. Schreb. iii, 1843, 392. (Compiled.) Pseudostoma douglasii, Aup. & BACH., Q. N. A. iii, 1853, 24, pi. 105 (altogether too brightly colored). (Mainly compiled from Richardson.) Geomys (Thomomys) douglasi, GIEBEL, Sang. 1855, 531. (Compiled.) Thomomys douglassii, BAIRD, M. N. A. 1857, 394. (Minute description of specimens from Washiogton and Oregon Territories.)-SUCKL., P. B. R. Rep. xii, 1860, pt. ii, pp. 100^126. DIAGNOSIS.-Coloration heavier than in the foregoing; general cast reddish-brown, lined with dusky on the back; the head usually darker than the rest of the upper parts; on the sides, the color giving way to a clearer tawny-brown, which occupies the belly also, there overlying the plumbeous roots of the fur as a strong wash. Face and mouth-parts dusky, or even sooty-blackish, contrasting with the white lining of the pouches. No pure white on the under parts. Tail and feet usually incompletely whitish, or quite dusky. If anything averaging rather larger than true talpoides. Hand rather shorter than the foot, owing to less development of the claws, which are only about 0.40 long. HABITAT.-Pacific coast and slopes of the United States, from Washington Territory to Southern California. Description (from San Francisco specimens).-Having already sufficiently insisted upon the fact that there is no decided difference in size or shape between this form and the last, beyond an average less development of the fore claws, there is little to he said by way of description, except to amplify the foregoing points of coloration. The extreme of the bulbivorus branch bf this species is readily recognized by a warmth and intensity of coloration not known to occur in specimens from the Northern Interior. The color varies a great deal in different specimens, but is never like the clear mouse-gray seen in talpoides. It is in reality an intimate mixture of yellowish-brown and dark-brown or blackish. Above, the pointing of the fur conceals the plumbeous bases of the hairs; below, this plumbeous shows, overlaid with a |
