I20 Field Museum of Natural History — Zoology, Vol. IX. 



Bill, very slightly hooked, not wide and flat at base, as in the 

 Flycatchers; toes, joined together at base. Plain colored birds, usu- 

 ally greenish or grayish, but often show a faint wash of yellow on 

 under parts; tail, always without white spots; first primary, variable, 

 very short in some species, in others nearly as long as second. 



Family VIREONIDjE. Vireos. 

 See page 227. 



PART 2. Tip of upper mandible, not notched or hooked. 



First primary, not short, never less than two thirds as long as 

 second or third; bill, stout and conical; nostrils, high near the cul- 

 men; primaries, 9; tarsus, flattened behind. 



Side ofbi//. 



Family FRINGILLID.ffi. Sparrows, Finches, Buntings, etc. 



See page 190. 



First primary, not short, never less than 

 two thirds as long as third, and often nearly 

 the same length; bill, slender and pointed; 

 back of tarsus, thin and sharp, not rounded 

 as in front; hind toe and claw, not longer 

 than middle toe and claw. 



Family MNIOTILTIDiE. Warblers, 



See page 231. 



