PLATE IX 



1. BLACK-THROATED BLUE WARBLER, ADULT MALE. 



2. BLACK-THROATED BLUE WARBLER, ADULT FEMALE. 



3. BLACK-THROATED BLUE WARBLER, YOUNG MALE. 



(ONE-HALF NATUS 



4. CERULEAN WARBLER, ADULT MALE. 



5. CERULEAN WARBLER, ADULT FEMALE. 

 6 .CERULEAN WARBLER, YOUNG MALE. 



SIZE.) 



