FAMILY VIREONID^. VIKEOS. 



271 



FAMILY VIREONID^e. 



Vireos. 



Upper mandible, with very small hook at tip ; first primary, very short 

 in some species, in others nearly as long as second ; toes, joined at base. 

 Plain colored birds, usually greenish or grayish, but often showing a faint 

 wash of yellow on underparts ; tail, always without white spots. 



Group 1. Wing, less than 2.37 inches long. 



1 



W^' 



■^^ 



■fT^J^ 



m ■'■tij 



('low 11, •^niyixli: orbital ring; and lores, dull white. U.-in-ly oci'iir-; cast of 

 Illinois. 



Bell's Vireo. 



Vircn hill it. 

 See Xo. 480. 



Crown, ^iitiyi-ilu oftrn tin;,n'(l witli olive; orbital rin^ and lores, 

 yellow. 



White-eyed VIreo. 

 Vireo noveburii<eu.tig, uml racfs. 

 See Xo. 478. 



478 



