576 BIRDS FROM CARIBBEAN SEA AND HONDURAS. 



B. Dendroica discolor (Vieill.). 

 One specimen (February 12). 



9. Dendroica vitellina (Cory.). 



Thirteen specimeus, February 2 to 18. These I am unable to distin- 

 guish satisfactorily from Granil Cayman examples, of which, however, I 

 have only four for comparison, and these rather i>oor skins. INlr. Town- 

 send's series shows that, in the Swan Island bird at least, there is no 

 constant sexual difterence in plumage, some of tlie brightest colored 

 specimens being females, while three of the dullest colored specimens, 

 with hind portion and sides of neck dull ash-gray, throat partly whitish, 

 etc., are males. A young bird in first plumage is very different from the 

 adults, and may be described as follows : 



Nestling 2>htma(jG (No. 111258, Swan Island, February 3, 1887 ; Charles 

 H. Towusend) : Above plain light grayish brown, somewhat darker on 

 back ; middle and greater wing coverts edged with lighter brownish and 

 indistinctly tipped with dull-light buffy; remiges and rectrices dusky, 

 edged with light olive, their edgings on tertials broader and' paler ; 

 lower parts entirely dull whitish, faintly tinged with yellow posteriorly, 

 strongly tinged with grayish brown on sides of breast. 



10. Geothlypis trichas (Linx.). 

 One specimen, February 12. 



11. Seiurus noveboracensis (Gmel.). 



Two specimens, February 21 and March 27. 



12. Seiurus aurocapillus (LiXN.). 

 One specimen, February 24. 



13. Setophaga ruticilla (Lixx.). 



Two specimens, February 7 and 16. 



14. Chelidon erythrogaster (Bodd.). 

 One specimen, April 16. 



15. Spiza americana (Gm.). 



Two specimens, March 25 and April 14. 



16. Tyrannus tyrannus (Linn.). 

 One specimen, March 31. 



17. Contopus vicinus, sp. nov. 



Sr. CHAR. — Similar to C virens (Linn.), but with much larger bill, and 

 with pileum darker and more uniform. 



Adult male (type, No. 111270, Swan Island, Caribbean Sea, April 14, 

 1887, Charles H. Townsend): Pileum uniform sooty, with a very faint 

 olivaceous cast ; hind-neck, back, scapulars, and upper tail-coverts 

 plain grayish olive, the rump^, sides of head and neck, and sides of breast 

 similar but paler; wings and tail dusky ; middle and greater wing-cov- 

 erts tipped with light olive-grayish, forming two distinct bands, that on 

 greater coverts broader and x)aler; tertials distinctly edged with dull 



