FAMILY VIKEONID^. VIKEOS. 



273 



Group 3. Wing, from 2.75 to 3.25 inches long. 



Bi41, with small but distinct hook ; no streaks on back or breast ; 

 breast or throat, never spotted. 



First primary, longer than fourth; back and rump, olive; crown, plumbeous 

 gray, or bluish gray ; no dusky streak from base of bill on sides of throat ; 

 underpants, white, tinged with pale yellowish green on sides of body. 



Red-eyed Vireo. 



Vireo olivaceus. 

 See No. 470. 



Similar to Vireo olivaceus, but having a 

 dusky streak or line extending from 

 base of lower mandible on side of 

 throat. 



Black-whiskered Vireo. 

 Vireo calidris barbatulus. 

 See No. 469. 



First primary, very short and narrow; crown and back, grayish olive; under- 

 parts, dull white, faintly tinged with olive, or yellowish on sides ; no white 

 wing bars. 



Warbling Vireo. 

 Vireo gilvus. 

 See No. 473. 



