222 ORNITHOLOGY AND OOLOGY. 



{Tilandsia). The eggs are four or five, flesh-colored, with dark 

 spots at the greater end." 



Several eggs in my collection agree with the above descrip- 

 tion ; they exhibit an average of .81 by .63 inch in dimen- 

 sions. 



DENDROICA, Gray. 

 Syhicola, Gray, Genera Birds (2d ed., 1841), 32. (Not of Humphreys or Swain- 



BOU. ) 



Dendrmca, Gray, Genera Birds, Appendix (1842) 8. 



Bill conical, attenuated, depressed at the base, where it is, however, scarcely 

 broader than high, compressed from the middle; culmen straight for the basal half, 

 then rather rapidly curving, the lower edge of upper mandible also concave; gonys 

 slightly convex and ascending; a distinct notch near the end of the bill; bristles, 

 though short, generally quite distinct at the base of the bill ; tarsi long, decidedly 

 longer than middle toe, which is longer than the hinder one; the claws rather small 

 and much curved, the hind claw nearly as long as its digit; the wings long and 

 pointed ; the second quill usually a very little longer than the first ; the tail slightly 

 roimded and emarginate. 



Colors. — Tail always with a white spot ; its ground-color never clear olive-green. 



DENDROICA VIRENS. — ^aird 



The Black-throated Green Warbler. 



Motacilla virens, Gmelin. Syst. Nat., I. (1788) 985. 



Sylvia virens, Wilson. Am. Orn., II. (1810) 127. Nutt. Man., I. (1832) 376. 



And. Orn. Biog., IV. (1838) 70. 



Sylcicola virens. 



Description. 



Male, upper parts, exclusive of wing and tail, clear yellow olive-green, the 

 feathers of the back with hidden streaks of black; forehead and sides of head and 

 neck, including a superciliary stripe, bright yellow; a dusky-olive line from the bill 

 through the eye, and another below it; chin, throat, and fore part of breast, extend- 

 ing some distance along on the sides, continuous black ; rest of under parts white, 

 tinged with yellow on the breast and flanks; wings and tail feathers dark-brown, 

 edged with bluish-gray; two white bands on the wing; the greater part of the three 

 outer tail feathers white. Female, similar, but duller; the throat yellow; the black 

 on breast much concealed by white edges; the sides streaked with black. 



Length, five inches; wing, two and fifty-eight one-hundredths ; tail, two and 

 thirty one-hundredths inches. 



This beautiful bird is a quite common species in Rhode 

 Island, Connecticut, and Massachusetts, and is not rare in 

 the other New-England States, in which, I have no doubt, it 



