PLATE XIII 



1 . YELLOW- 



2. YELLOW-THROATED WARBI 



3. GRACE'S WARBLER, MALE. 



4. GRACE'S WARBLER, FEMALE. 



5. BLACK-THROATED GRAY WARBLER. MALE. 



6. BLACK-THROATED GRAY WARBLER, FEMALE 



(ONE-HALF NATURAL SIZE.) 



