PLATE XIII 



1. YELLOW-THROATED WARBLER, MALE. 



2. YELLOW-THROATED WARBLER, FEMALE. 



3. GRACE'S WARBLER, MALE. 



4. GRACE'S WARBLER, FEMALE. 



5. BLACK-THROATED GRAY WARBLER, MALE. 



6. BLACK-THROATED GRAY WARBLER, FEMAL 



(ONE-HALF NATURAL SIZE.) 



