_Adult_ ♀ (42,076. Mirador; Sartorius). Similar to the male in almost every respect. Plumbeous above rather darker and more uniform, although the difference is scarcely perceptible. Secondaries more broadly tipped with white, and upper tail-coverts more conspicuously barred with the same. White bars of the black areas beneath scarcely observable. Tail with eight white bars, as in the male longest primary with fourteen white bars on inner web of longest. Wing-formula, 3, 2–4–5=1. Wing, 11.30; tail, 7.80; tarsus, 1.70; middle toe, 1.55. _Juv. a_ (_intermediate stage_). ♂ (37,334, Mazatlan, W. Mexico; Col. A. J. Grayson). Plumbeous above darker and more brownish, uniform from rump to head, the former strongly tinged with rusty, this bordering the feathers. Tail darker and more brownish; white bars ten in number, instead of eight, narrower, and tinged with brownish; longest primary with thirteen bars of white on inner web. Lining of the wing black, leaving only a broad ochraceous stripe along the edge; feathers of the black portion with small circular white spots along their edges. Breast strongly tinged with ochraceous, and with large longitudinal blotches of black of cuneate form, and so crowded as to give almost the predominating color; the black patches lack entirely the white bars. Wing-formula, 3=2–4–1–5. Wing, 10.00; tail, 7.20. ♀ (55,019, Mazatlan, Grayson). Similar to the last, but lacking the rusty tinge on the rump; tail with eight white bars, as in the adult; pectoral stripes narrower and less numerous than in the preceding, and white bars distinguishable on the black areas. Wing-formula, 3, 2–4–1–5. Wing, 11.30; tail, 8.20. _b_ (_first plumage_). ♂ (45,693 and 49,508, Buenos Ayres, Conchitas; William H. Hudson). Similar to immature male (37,334). Above dull umber-drab, darker on the head; feathers of back, scapular, rump, and wings fading on edges; rump much tinged with rusty, this bordering the feathers. Tail with nine very obsolete, narrow, dull white bars, these not touching the edge of the feather on either web. Longest primary with ten transverse white bars on inner web. Beneath pale ochraceous, almost as deep anteriorly as posteriorly; dark areas restricted to a large patch on each side, and dull dark brown (very similar to the wings), instead of black, and scarcely varied; breast and upper part of abdomen (between the blackish lateral patches) with large longitudinal cuneate blotches of the same. “Winter visitor.” HAB. Whole of South America; northward through Central America and Mexico, across the Rio Grande, into Texas and New Mexico. Localities: Guatemala (SCL. Ibis, I, 219); Cathagena (CASSIN, Pr. An. N. S. 1860, 132); La Plata (BURM. Reise, 437); Mexiana (SCL. & SALV. 1867, 590); Brazil (PELZ. O. Bras. I, 4); Buenos Ayres (SCL. & SALV. 1868, 143); Chile (PHILIPPI); W. Peru (SCL. & SALV. 1858, 570; 1869, 155); Venezuela (SCL. & SALV. 1869, 252).