Black-throated Blue Warbler, Sylvia canadensis, Wils. Amer. Orn. v. ii. p. 115. Male. Sylvia canadensis, Bonap. Syn. p. 84. Male. Black-throated Blue Warbler, Sylvia canadensis, Nutt. Man. v. i. p. 398. Male. Black-throated Blue Warbler, Sylvia canadensis, Aud. Orn. Biog. v. ii. p. 309. Male. Pine-swamp Warbler, Sylvia pusilla, Wils. Amer. Orn. v. v. p. 100. Young. Sylvia sphagnosa, Bonap. Syn. p. 85. Young. Pine-swamp Warbler, Sylvia sphagnosa, Nutt. Man. v. i. p. 406. Young. Pine-swamp Warbler, Sylvia sphagnosa, Aud. Orn. Biog. v. ii. p. 279. Female and Young. 96. 21. Sylvicola maculosa, Lath. Blue-headed Yellow-rumped Wood-Warbler.--Black-and-Yellow Warbler. Plate CXXIII. Male and Female. Plate L. Young. Wings of moderate length, the outer four quills nearly equal, the second and third longest and equal, the fourth longer than the first; tail almost even. Upper part of head and hind neck ash-grey; eyelids, and a band over the eye, white; part of forehead, loral space, and a broad band down the side of the neck, with the fore part of the back, and upper tail-coverts deep black; lower parts and rump bright yellow; the lower part of the throat, the breast and sides, spotted with black; wings and tail-feathers brownish-black, edged with grey; two white bands on the wing; all the tail-feathers, except the middle two, with a large patch of white on the inner web, at about two-thirds of their length. Young yellowish-grey above, with the head light grey, the rump yellow; lower parts of a duller yellow, with only faint dusky streaks on the sides. _Male_, 5, 7-1/2. From Texas northward. Very abundant. Migratory. Black-and-Yellow Warbler, Sylvia magnolia, Wils. Amer. Orn. v. iii. p. 63. Adult. Sylvia maculosa, Bonap. Syn. p. 78. Black-and-Yellow Warbler, Sylvia maculosa, Nutt. Man. v. i. p. 370. Sylvicola maculosa, Yellow-rump Warbler, F. Bor. Amer. v. ii. p. 213. Black-and-Yellow Warbler, Sylvia maculosa, Aud. Orn. Biog. v. ii. p. 145, Adult; v. i. p. 260, Young; v. v. p. 458. 97. 22. Sylvicola discolor, Vieill. Prairie Wood-Warbler. Plate XIV. Male and Female. Wings rather short, with the outer four quills nearly equal, the second and third longest; tail emarginate and rounded. Male with the upper parts yellowish-green, the back spotted with chestnut-red; lower parts, and a band over the eye, bright yellow; two bands of dull yellow on the wing; outer four tail-feathers with a white patch on the inner web; a small streak before and behind the eye, one on the cheek, a spot on the side of the neck, and oblong markings on the sides, black. Female similar, but paler, especially beneath, and without the black streaks on the side of the head. _Male_, 5, 7. From Texas to Massachusetts. Migratory. Abundant. Prairie Warbler, Sylvia minuta, Wils. Amer. Orn. v. iii. p. 87.