SYLVICOLIDiE, WARBLERS. — GEN. 35. 101 



often obsolete on the crown ; below more or less completely tinged with 

 pale greenish-yellow, the streaks very obscure and sometimes altogether 

 Avauting ; under tail coverts usually pure white; a yellowish superciliary 

 line ; wing-bars tinged with the same color. When the streaks on the sides 

 are obsolete, the species bears an extraordinary resemblance to young 

 castanea, which see. One of the larger species ; 5 J-5|, wing 2f-3, tail 

 2-2J. Eastern North America, very aljundant ; a late migrant; when the 

 black-polls appear in force, the collecting season is about over ! WiLS., iv, 

 40, pi. 30, f. 3; vi, 101, pi. 54, f. 3; Nutt., i, 383; Aud., ii, 28, pi. 



78; Bd., 280 striata. 



V) "^ -Bay-breasted Warbler. Autumnal Warbler. $ in spring : back thickly 

 streaked with black and grayish-olive ; forehead and sides of head black 

 enclosing a large deep chestnut patch; a duller chestnut (exactly like a blue- 

 bird's breast) occupies the whole chin and throat and thence extends, more 

 or less interrupted, along the entire sides of the body ; rest of under parts 

 ochrey or bufiy whitish ; a similar buffy area behind the ears ; wing-l)ars and 

 tail-spots ordinary; bill and feet blackish. The 9 in spring is more oliva- 

 ceous than the male, with the markings less pronounced ; but always sliows 

 evident chestnut coloration ; and probably traces of it persist in all adult 

 birds in the fall. The young, however, so closely resemble young striata, 

 that it is sometimes impossible to distinguish them with certainty. The 

 upper parts, in fact, are of precisely the same greenish-olive, with black 

 streaks; but there is generally a difference lielow — castanea being there 

 tinged with buffy or ochrey, instead of the clearer pale yellowish of striata; 

 this shade is particularly observable on the belly, flanks and under tail 

 coverts, just where striata is whitest ; and moreover, castanea is usually not 

 streaked on the sides at all. Mature spring birds vary interminably in the 

 extent and intensity of the chestnut. Size of striata. Eastern United 

 States, abundant. Sylvia autumnalis. Wils., iii, 65, pi. 23; Nutt., i, 

 390; Aud., Orn. Biog., i, 447, pi. 83 (young). Wils., ii, 97, pi. 14, f. 



4; Nutt., i, 382; Aud., ii, pi. 80; Bd., 276 castanea. 



& ^ Chestnut-sided Warbler. $ in spring : back streaked with black and 

 pale yellow (sometimes ashy or whitish) ; whole croivn pure yelloio immedi- 

 ately bordered with white, then enclosed with 

 black ; sides of head and neck aud whole under 

 parts pwe white, former with an irregular black ^^^==^ 

 crescent beftu'e the eye, one horn extending back- 

 ward over the eye to border the yellow crown and 

 be dissipated on the sides of the nape, the other S 

 reaching downward aud backward to connect with 

 a chain of pure chestnut streaks that run the whole fig. «. ciiestnut-sided Wiu-wer. 

 length of the body, the under eyelid and auricnlars being left white ; wino-- 

 bands generally fused into one large patch, and, like the edgiuo- of the 

 inner secondaries, much tinged with yellow; tail-spots white, as usual; 

 bill blackish, feet brown. 9 in spring, quite similar; colors less pure; 



