288 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Crown, olive green (sometimes with forehead 

 yellow) ; uuderparts, greenish yellow ; back and 

 rump, olive greeu : terminal third of inner webs 

 of outer tail feathers, white. 



BIue=winged Warbler. 



Helminthophila pinus (female and immature) . 

 See No. 487. 



Underparts, tinged with greenish yellow; undertail coverts, white; crown, back, 

 and rump, olive green ; outer tail feathers very narrowly edged with white 

 (entirely absent in some specimens) . 



Tennessee Warbler. 



Helminthophila peregrina (female in fall and immature} . 

 See No. 493. 



Underparts, yellow, washed with olive on sides; sides of head and lores, 

 yellow; crown, olive green; back and rump, olive green; undertail coverts, 

 pale yellow. 



Hooded Warbler. 



Sylvania mitrata ( female and immature in fall) , 

 See No. 525. 



Kirtiand's Warbier. 



Underparts, yellow; sides, streaked with black; crown, slaty gray ; bacfc and 



rump, ashy, streaked with black ; lores, black. 



Kirtiand's Warbler. 



Dendroica kirtlandii. 

 See No. 510. 



