42 



hh. Back not so colored, 

 i. Wing bars not white. 



■ Beneath white, Chestnut-sided Warbler. 

 Beneath yellow, 



Yellow Red-poll Warbler. 

 ii. Wing bars, if present, white. 

 j. Large white spot at base of primaries. 



Black-throated Blue Warbler. 

 jj. No such spot, 

 k. Rump yellow. 



I. White spots near middle of tail feathers. 



Magnolia Warbler. 



II. White spots near ends of tail feathers. 



Beneath white streaked with black, 



Myrtle Warbler. 

 Beneath yellow streaked with black, 



Cape May Warbler. 

 kk. Rump not yellow. 



I. White spots at ends of 5 pairs of tail 



feathers, Caerulean Warbler. 



II. White on tail not so distributed. 



m. Outer tail feather edged with white 

 externally. 

 Throat black or blackish, 



Black -THROATED Green Warbler. 

 Throat orange or yellow, 



Blackburnian Warbler. 



mm. Outer tail feather not edged with white. 



n. Large white spots at ends of only 2 



outer tail feathers, Pine Warbler. 



nn. White spots small, at ends of 2 or 



more outer tail feathers. 



Bay or bufflsh on breast ; belly 

 white, Bay-breasted Warbler. 



