41 



ff . Spotted beneath. 



Tinged with buff beneath ; legs pale, 



Louisiana Water Thrush. 

 Tinged with sulphur-yellow beneath ; legs 

 dark, Watek Thrush. 



dd. Length over 6 inches ; hind claw almost straight, 

 nearly twice as long as middle claw. Titlark. 

 ddd. Length usually under 5^ inches ; if over that, 

 outer tail feathers conspicuously marked with 

 white . 

 e. Tail feathers without white blotches, 

 f . Throat yellow, 

 g. Tail nearly equal to wing, 



Maryland Yellow-throat. 

 gg. Tail much shorter than wing. 



Whole head yellow. Yellow Warbler. 

 Whole head not yellow, 



Nashville Warbler. 

 ff . Throat not yellow. 



A white ring around eye, 



Connecticut Warbler. 

 No white eye-ring. Mourning Warbler. 

 ee. Tail feathers with white blotches, 

 f . Tarsus shorter than middle toe and claw, 



Black and White Warbler. 

 ff . Tarsus not shorter than middle toe and claw, 

 g. Rictal bristles nearly wanting. 



Entire fore-parts golden yellow, 



Prothonotary Warrler. 

 Fore-parts not wholly yellow, 



Golden-winged Warbler. 

 gg. Rictal bristles evident, 

 h. Back blue, with a central yellowish patch, 



Parula Warbler. 



