244 DWIGHT 



Female. — The sexes are alike, although the female is apt to 

 be of a paler yellow and the moults correspond. 



Helinaia swainsonii Aud. Swainson's Warbler ' 



1. Natal Down. No specimen seen. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Above, including wing coverts, pale cinnamon-brown. Below, paler cinnamon. 

 Wings and tail olive-brown edged with olive-green. Crown with two indistinct 

 lateral stripes pale brownish gray. A dusky transocular streak. Bill and feet 

 pale pinkish buff. Scarcely differs from Hclmitherus verjnivorus but rather 

 paler. 



3. First Winter Plumage acquired by a partial postjuvenal 

 moult which involves the body plumage and wing coverts but 

 not the remiges nor rectrices. Young and old become prac- 

 tically indistinguishable. 



Above, bistre, greener on the back. Below, yellowish white, shading to olive-buff 

 on sides and flanks. Superciliary line indistinctly white ; a dusky line through 

 the eye. 



4. First Nuptial Plumage acquired by wear. The head 

 becomes Mars-brown in contrast to the olive back, and below the 

 plumage is somewhat paler. 



5. Adult Winter Plumage acquired by a complete post- 

 nuptial moult. Practically indistinguishable from first winter 

 dress. 



6. Adult Nuptial Plumage acquired by wear as in the 

 young bird. 



Female. — The moults and plumages correspond to those of 

 the male, and females are hardly distinguishable except by a 

 duller line through the eye. 



Helmitherus vermivorus (Gmel.). Worm-eating Warbler 



1. Natal Down. Brownish mouse-gray. 



2. Juvenal Plumage acquired by a complete postnatal moult. 



Whole body plumage and the wing coverts cinnamon, palest on the abdomen. 

 Wings and tail olive-brown edged with olive-green. Two indistinct lateral 



