KEY TO WARBLERS 343 



4'. No black stripe on side of face or neck ; black cap 

 separated from bill by yellow space. Female gen- 

 erally without black cap. 



p. 339. Wilson's Warbler. 



3'. Top of head not black. 

 5. Head and neck gray, strongly contrasted with color 

 of back ; cap reddish brown. 



p. 322. Nashville Warbler. 



5'. Head and neck not gray, same color as back. 

 6. Broad black mask over bill and on cheeks. Song a 

 loud ringing ivree'-cJiet-tn, wree' -chet-ty , ivree'-chet-ty. 

 Female duller and without mask. 



p. 315. Maryland Yellow-throat. 



6'. No black on face or cheeks. Largest of the War- 

 blers (length about 1\ inches). Song mixed with 

 whistles, chucks, and calls. 



p. 331. Yellow-breasted Chat. 



2'. Under parts with markings. 

 7. Throat black. 



Face yellow, hooded in black. Found in damp woods, 

 p. 327. Hooded Warbler. 



1' . Throat not black. 

 8. A ring of black, or black spots on throat or breast. 



9. Heavy white patches on wings and middle of tail 

 feathers. 



p. 324, Black and Yellow Warbler. 

 9'. No white patches on wings or tail. 



p. 322. Canadian Warbler. 



8'. No ring of black or black spots on throat or breast. 



10. Under parts streaked with black, chiefly on sides ; 

 middle of back chestnut. Found in old fields and 

 juniper pastures. Female sometimes without chest- 

 nut patch ... p. 325. Prairie Warbler. 



