The specimen with a general resemblance to an immature _T. migratorius_ (especially the western variety) in the white superciliary streak and general markings, is much lighter beneath than in any of the many skins of _T. migratorius_ examined; there being none of the dark chestnut or cinnamon shade, but rather a light buff; the belly and flanks are much more purely white. The superciliary stripe extends farther behind the eye; indeed, in most specimens of _migratorius_ the white is nearly confined to the eyelids. The bill and wings are rather longer than usual in _migratorius_; the middle toe, on the other hand, appears shorter. Nothing is on record in regard to the habits of this bird. SUBGENUS HESPEROCICHLA, BAIRD. _Hesperocichla_, BAIRD, Rev. Am. Birds, I, 1864, 12. (Type _Turdus nævius_, GM.) [Line drawing: _Turdus nævius._ 9814] The single species of this subgenus differs in form from the Robins (_Planesticus_), in the more awl-shaped bill, the curved commissure, and the absence of a notch at the end; the longer, slenderer, and straighter claws; and in the dissimilarity in color of the sexes. In the latter respects it agrees with _Merula_ of Europe and Middle America; in which, however, the bill is distinctly notched, and less attenuated. The tail is shorter and broader than in _Planesticus_, more as in true _Turdus_ or _Hylocichla_. Turdus nævius, GMEL. OREGON ROBIN; VARIED THRUSH. _Turdus nævius_, GM. S. N. I, 1788, 817.—SCLATER, P. Z. S. 1857, 4; 1859, 331.—BAIRD, Birds N. Am. 1858, 219; Rev. Am. B. 1864, 32.—COOPER & SUCKLEY, P. R. R. R. XII, II, 1859, 172.—COUES, Pr. A. N. S. 1866, 65. (Quotes occurrence on Colorado River, above Fort Mohave, as exceptional.)—MAYNARD (Massachusetts!).—TURNBULL (N. Jersey!).—DALL & BANNISTER (Alaska).—COOPER, Birds Cal. 10. _Orpheus meruloides_, RICH. F. B. A. II, 1831, 187, pl. xxxviii. Other figures: VIEILLOT, Ois. Am. Sept. II, 1807, pl. lxvi.—AUD. Orn. Biog. IV, 1838, pl. ccclxix, and ccccxxxiii.—IB. Birds Am. III, pl. cxliii. SP. CHAR. Tail nearly even; the lateral feather shorter. Above, rather dark bluish slate; under parts generally, a patch on the upper eyelids continuous with a stripe behind it along the side of the head and neck, the lower eyelids, two bands across the wing coverts and the edges of the quills, in part, rufous orange-brown; middle of belly white. Sides of the head and neck, continuous with a broad pectoral transverse band, black. Most of tail feathers with a terminal patch of brownish white. Bill black. Feet yellow. Female more olivaceous above; the white of the abdomen more extended; the brown beneath paler; the pectoral band obsolete. Length, 9.75 inches; wing, 5.00; tail, 3.90; tarsus, 1.25.