72 BLACK- THROATED GREEN WARBLER. 



I have represented the male and female ; the latter, I believe, has 

 not been hitherto figured. 



Sylvia vieens, Lath. Ind. Ornith. vol. iL p. 537. 



Black-throated Green "Warbler, Sylvia virens, Wils. Amer. Ornith. vol. ii. 



p. 127, pi. 17,%. 3. 

 Sylvia virens, Ch. Bonaparte, Synopsis of Birds of United States, p. 80. 

 Black-throated Green Warbler, Nuttall, Manual, vol. i. p. 376. 



Adult Male. Plate CCCXCIX, Fig. 4 



Bill short, straight, rather strong, tapering, compressed toward the 

 end, acute ; its dorsal line very slightly convex, the sides convex, the 

 notch extremely small, the gape-line straight ; lower mandible with the 

 angle short and broad, the dorsal line ascending and nearly straight, 

 the edges a little inflected, the tip acute. Nostrils basal, oblong. 



Head of moderate size, ovate ; neck short ; body slender. Feet of 

 ordinary length, slender; tarsus extremely compressed, covered ante- 

 riorly with seven scutella, of which the upper are blended, sharp be- 

 hind ; toes slender, free ; the first proportionally stout, the third much 

 longer than the lateral, which are nearly equal ; claws arched, of mo- 

 derate length, slender, much compressed, tapering to a fine point. 



Plumage soft, blended. Slight bristles at the base of the upper 

 mandible. Wings of moderate length ; the outer three quills nearly 

 equal, the second, which is longest, exceeding the first by only a quarter 

 of a twelfth; the outer secondaries faintly emarginate, the inner roimded. 

 Tail of moderate length, slightly emarginate, the middle feathers be- 

 ing two twelfths of an inch shorter than the longest. 



Bill black ; feet dusky. Iris hazel. The general colour of the up- 

 per parts is yellowish-green ; the anterior part of the forehead, a band 

 over the eye, the cheeks and the sides of the neck, bright yellow ; the 

 fore part of the neck, the anterior part of the sides, and some spots on 

 the hind part of the latter, black ; the rest of the lower parts white. 

 Quills and tail-feathers brovraish-black ; two bands of white on the 

 wing, formed by the first row of small coverts, and the tips of the se- 

 condary coverts. The quills are margined with greenish-white ; the 

 greater part of the outer two tail-feathers, and a patch on the inner 

 web of the next, white. 



Length to end of tail 4^1 inches ; bill along the ridge ^^ ; wing from 



