KEY TO SPECIES OF WOOD WARBLERS 279 



b. Head and neck slaty; back olive-green; belly yellow. LENGTH 



680. MACGILLIVRAY WARBLER 51 



c. More or less yellow or yellowish. 



1. Dull yellow below, darker-streaked. 



646a. LUTESCENT WARBLER 4f 



2. Darker than 646a. but indistinguishable in 

 field (S.W. Calif.). 



646b. DUSKY WARBLER 5 



3. Chest and sides rufous-streaked. 



652c. CALIFORNIA YELLOW WARBLER 4| 



Large. 



Bright yellow below, except white belly ; grayish olive above; 

 black lores and cheek-stripe; bill very heavy for Warbler. 



683a. LONG-TAILED CHAT 7 



