PASSERINE BIRDS OF NEW YORK 245 



crown stripes brownish mouse-gray. A transocular streak dusky. Bill and 

 feet pinkish buff remaining quite pale later. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult, beginning early in July, which involves the body plumage 

 and wing coverts but not the rest of the wings nor the tail. 

 Young and old become practically indistinguishable. 



Resembles the previous plumage. Above, grayish olive-green, the lateral crown 

 stripes and the postocular streak black, the median stripe and the superciliary 

 lines pale buff-yellow or deep cream-color. Below, cream-color washed on the 

 throat with buff-yellow and on the flanks with olive-buff. 



4. First Nuptial Plumage acquired by wear which is not 

 obvious, the tints fading slightly. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult beginning about the first of July. Adults are in- 

 distinguishable from young birds although sometimes paler. 



6. Adult Nuptial Plumage acquired by wear as in the 

 young bird. 



Female. — The sexes are alike in all plumages and the moults 

 are identical. 



Helminthophila pinus (Linn.). Blue- winged Warbler 



1. Natal Down. Mouse-gray. 



2. Juvenal Plumage acquired by a complete postnatal 

 moult. 



Entire body plumage olive-yellow darkest on the back and throat. Wings and tail 

 slate-gray largely edged with plumbeous gray, the tertiaries and coverts with 

 olive-yellow ; the greater and median coverts tipped with white, yellow 

 tinged. Rectrices largely white. Lores dusky. Bill and feet pinkish buff 

 becoming dusky, 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult, beginning early in July, which involves the body plum- 

 age and wing coverts but not the rest of the wings nor the tail, 

 young and old becoming practically indistinguishable. 



Similar to the previous plumage. Above, bright olive-green, lemon- yellow on the 

 crown veiled by greenish tips. Below, bright lemon-yellow, the crissum white 

 or merely tinged with yellow. Transocular streak black. Wing coverts plum- 

 beous gray, edged with olive-green, the greater and median tipped with white, 

 yellow tinged, forming two broad wing bands. 



