Olivaceous of upper parts like _swainsoni_. Reddish of tail not invading the rump, and the tail decidedly more castaneous than the upper coverts. Beneath almost pure white; scarcely any buff tinge on breast; flanks and tibiæ grayish or plumbeous olive. Size smaller than _swainsoni_; bill depressed. Wing, 3.50; tail, 2.60; culmen, .60; tarsus, 1.15. _Hab._ Western Province of North America, from Kodiak to Cape St. Lucas. East to East Humboldt Mountains … var. _nanus_. Olivaceous above, like preceding; the upper tail-coverts scarcely different from the back. Tail yellowish-rufous. Beneath like _nanus_. Size larger than _swainsoni_. Wing, 4.20; tail, 3.35; culmen, .80; tarsus, 1.30. _Hab._ Rocky Mountains. From Fort Bridger, south (in winter) to Southern Mexico … var. _auduboni_. Turdus mustelinus, GMELIN. THE WOOD THRUSH. _Turdus mustelinus_, GMELIN, Syst. Nat. I, 1788, 817.—AUDUBON, Orn. Biog. I, 1832, 372, pl. 73.—IB. Birds Am. III, 1841, 24, pl. 144.—D’ORB. La Sagra’s Cuba Ois. 1840, 49.—BAIRD, Birds N. Am. 1858, 212.—IB. Rev. Am. Birds, 1864, 13.—SCLATER, P. Z. S. 1856, 294, and 1859, 325.—JONES, Nat. in Bermuda, 26.—GUNDLACH, Repertorio, 1865, 228.—MAYNARD.—SAMUELS, 146. _Turdus melodus_, WILS. Am. Orn. I, 1808, 35, pl. ii. _Turdus densus_, BONAP. Comptes Rendus, XXVIII, 1853, 2.—IB. Notes Delattre, 1854, 26 (Tabasco). Additional figures: VIEILLOT, Ois. Am. Sept. II, pl. lxii.—WILSON, Am. Orn. I, pl. ii. SP. CHAR. Above clear cinnamon-brown, on the top of the head becoming more rufous, on the rump and tail olivaceous. The under parts are clear white, sometimes tinged with buff on the breast or anteriorly, and thickly marked beneath, except on the chin and throat and about the vent and tail-coverts, with sub-triangular, sharply defined spots of blackish. The sides of the head are dark brown, streaked with white, and there is also a maxillary series of streaks on each side of the throat, the central portion of which sometimes has indications of small spots. Length, 8.10 inches; wing, 4.25; tail, 3.05; tarsus, 1.26. Young bird similar to adult, but with rusty yellow triangular spots in the ends of the wing coverts. HAB. U. S. east of Missouri plains, south to Guatemala. Bermuda (not rare). Cuba, LA SAGRA; GUNDLACH. Honduras, MOORE. Cordova, SCL. Orizaba (winter), SUMICHR.