298 



KEY TO THE BIKUS OF EASTERN NORTH AMERICA. 



Tliront aiul sides, chestnut ; crown, chestnut. 



Bay=breasted Warbler. 



Dendroka cutitaiwd {adnU), 

 See No. 503. 



Throat and sides, more or less marked with chestnut; crown, oHve green, 

 streaked with black; back, grayish olive, streaked witli black; (crown, with 

 indications of chestnut ;) Ijelly, cream white. 



Bay=breasted Warbler. 



Dendroica castani^a (female). 

 See No. 503. 



Throat and underparts, cream white, sliadiug into pale buft"; wliite on flanks; 

 crown and back, green, indistinctly streaked with black ; win<^ bars, white. 



Bay=breasted Warbler. 



Dendroica castanea {immature) . 

 See No. 503. 



Throat and underparts, pale yellowish white ; crown and back, green, indis- 

 tinctly streaked ; wing l)ars, white; often verj' ditlicult to distinguish from 

 immature specimen of D. castanea. 



Black-poll Warbler. 



Dendroica striata {immature^. 

 See No. 504. 



Throat and underparts, white ; ashy on the 

 sides ; crown, slaty gray ; back, green ; 

 under tail coverts. wliit<'. 



Tennessee Warbler, 



Helminthophila piregrina {adult male). 

 See No. 493. 



Throat and underparts, white ; wing bars, yellow ; crown and back, bright 

 green. 



Chestnut-sided Warbler. 



Dendroica pennsylvanicn {ir.imature) . 

 See No. 502. 



