240 DWIGHT 



zona the juvenal dress is acquired chiefly during July. The 

 postnuptial moult is completed early in August as indicated by 

 several adults. 



Vireo noveboracensis (Gmel.). White-eyed Vireo 



1. Natal Down. No specimen seen. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, dull brownish olive-green. Wings and tail deep olive-brown edged with 

 bright olive-green, the tertiaries with pale buff, the greater and median coverts 

 with straw-yellow forming two distinct wing bands. Below, dull grayish 

 white, buffy on the throat, strongly washed on the sides and crissum with sul- 

 phur-yellow (sometimes buffy). Auriculars pale ecru-drab; supraloral and 

 orbital regions pale canary-yellow, a dusky loral streak. Bill pinkish buff, be- 

 coming dusky ; feet paler, becoming plumbeous gray. Iris mouse-gray, be- 

 coming white by the following spring. 



3. First Winter Plum.\ge acquired b}- a complete post- 

 juvenal moult beginning about the middle of August. The 

 juvenal dress is worn much longer than that of the other Vireos, 

 becoming rapidly ragged from the thicket-loving habits of the 

 species and thus probably its complete renewal is a necessity. 



Differs very little from the previous plumage. The olive-green is brighter above, 

 markedly edged on the pileum and neck with smoke-gray contrasting with the 

 back. The wings and tail are darker, the edgings of the wing coverts and 

 tertiaries pale straw-yellow. The throat is grayer and the yellow wash of the 

 sides brighter and greener. 



Young and old become practically indistinguishable except by 



the gray iris of the young bird. 



4. First Nuptial Plu.mage acquired by wear which is marked. 

 The back becomes browner, and the gray is confined to the 

 neck, but the yellow below shows little change. 



5. Adult W^inter Plumage acquired by a complete post- 

 nuptial moult. Practically indistinguishable from first winter 

 dress, but the yellow about the head is apt to be richer and the 

 gray clearer. The iris is white. 



6. Adult Nuptial Plumage acquired by wear as in the 

 young bird. 



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

 are the same. 



