WOOD WARBLERS. 335 



cs. Under parts pale yellowish white. 



661. Black-poll Warbler (Im.). 

 </*. Back olive-green, without streaks. . 671. Pine Warbler 9 . 

 e^. Back with a bluish tinge and without streaks. 



658. Cerulean Warbler (Im.). 

 B. Without white wing-bars. 



a. Under parts briglit orange or orange-yellow ; wings, tail-coverts, 

 and tail bluish gray 637. Prothonotary Warbler. 



b. Under parts pure yellow ; wings, rump, and tail greenish ; head 

 sometimes blackish ; inner web of outer tail-feathers white. 



684, Hooded Warbler ( 9 and im.). 



c. Under parts pale yellowish; head ashy; rump olive-green; small 

 white tail-spots, not reaching to ends of feathers. 



640. Bachman's Warbler ( 9 and im.). 



d. Under parts pale yellowish ; entire upper parts olive-green ; a 

 white spot at the base of the primaries. 



654. Black-throated Blue Warbler 9 . 

 Tail without white spots or patches ; wangs without white wing-bars. 



A. Cap, or forehead, or cheeks black or blackish. 



a. Cap black ; forehead and cheeks yellow. 



685. Wilson's Warbler. 



b. Band on the forehead and cheeks black or blackish ; no yellow 

 line over the eye 681. Maryland Yellow-throat s . 



681b. Florida Yellow-throat $ . 



c. Forehead or crown and cheeks black or blackish ; a clear yellow 

 line over the eye 677. Kentucky Warbler. 



B. 1^0 black on forehead; crown ashy, of a very different color from 

 the olive-green back, or with the bases of the crown feathers rufous- 

 brown or chocolate. 



a. Crown plain ashy ; under tail-coverts white. 



640. Bachman's Warbler, 



b. Crown ashy ; bases of feathers chestnut ; eye-ring distinctly wiiite ; 

 most of under parts and under tail-coverts bright yellow, 



645. Nashville Warbler, 



c. Crown of nearly the same color as the back ; the feathers with 

 rufous-brown bases ; under parts dull greenish yellow. 



646. Orange-crowned Warbler. 



C. Crown of the same color as the back ; forehead the same, or yellow- 

 ish, or brownish. 



a. Under parts bright yellow. 



a*. Upper parts bright olive-green; forehead yellowish; short 

 bristles at base of bill ; tail greenish brown. 



685. Wilson's Warbler (Im.). 

 a^. Upper parts bright greenish yellow ; inner web of tail-feathers 



yellow 652. Yellow Warbler 9. 



«8. Upper parts ashy greenish ; eye-ring white. 



645. Nashville Warbler (Im.). 



b. Throat and breast yellow ; belly white or whitish. 



