JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 



229 



First primary, not short (at least as long as fifth); lores and eye 

 ring, dull white; under parts, washed with very pale greenish yellow; 

 no wing bars. Vireosylva philadelphica. 



Philadelphia Vireo. 



See No. 294. 



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



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

 breast or throat, never spotted. 



First primary, not shorter than fourth; back and rump, olive; 

 crown, plumbeous gray, or bluish gray; no dusky streak from base of 

 bill on sides of throat ; under parts, white, tinged with pale yellowish 

 green on sides of body. Vireosylva olivacea. 



Red-eyed Vireo. 

 See No. 293. 



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. Vireosylva gilva. 



Warbling Vireo. 

 See No. 295. 



First primary, short; crown, gray; 

 back, olive; rump, olive green; throat 

 and belly, white; sides of body, green- 

 ish yellow; lores, white; sides of head, 

 gray; wing bars, white. 



Lanivireo solitarius. 

 Blue-headed Vireo. Solitary Vireo. 

 See No. 297. 



