BLUE-WINGED WARBLER 65 



ample time for the birds to complete a nest, and in more than one 

 instance I have [found that] a nest commenced one day contained an 

 egg the second day thereafter." (Jacobs. 5 ) 



Eggs- 4 to 6, usually 5. Ground color white, markings the 

 same as in the eggs of the Blue-winged Warbler, except that they 

 are more profuse and of larger size, tending to form small blotches 

 in many cases. Size; average, .66x.5i; extremes, -73X.55, .58x.5i, 

 .61x48. (Figs. 15-17.) 



Nesting Dates. Weaverville, N. C, May 22, Tarboro, N. C., 

 June 22 (C. W. C.); Waynesburg, Pa., May 14- June 13 (Jacobs)', 

 Bethel, Conn., May 2Q-May 31 (Bishop) ; Monroe County, Mich., 

 May i7-June 18 (J. P. N.). 



BIOGRAPHICAL REFERENCES 



(i) J. WARREN, Nesting of the Golden-winged Warbler (Helminthophila 

 chrysoptera) in Massachusetts, Bull. Nutt. Orn. Club, I, 1876, 6. (2) 'SCOLOPAX' 

 [=MORRIS GIBBS], Nesting Habits of the Golden-winged Warbler, Oologist, 

 XI, 1894, 3i i- (3) J- P- N [ORRIS], A Series of Eggs of the Golden-winged 

 Warbler, Orn. and O61., XV, 1890, 21. (4) J. H. SAGE, Notes on Helmin- 

 thophila chrysoptera in Connecticut, Auk, X, 1893, 208. (5) J. W. JACOBS, 

 The Haunts of the Golden-winged Warbler, with notes on Migration, Nest 

 Building, Song, Food, Young, Eggs, Etc., published by the author, Waynes- 

 burg, Pa. (6) E. H. EAMES, Notes on the Blue-winged Warbler and Its 

 Allies, Auk, VI, 1889, 305. (7) WM. BREWSTER, Birds of the Cambridge 

 Region, 322. 



BLUE-WINGED WARBLER 



VERMIVORA PINUS (Linn.) PIte V 



Distinguishing Characters. A black or blackish line through the eye; fore- 

 head yellow or yellowish; two white wing-bars. Length (skin), 4.10; wing, 

 2.45; tail, 1.85; bill, .46. 



Adult <$, Spring. Crown yellow, nape and back olive-green; a black or 

 blackish line to or through the eye; tail gray, three outer feathers with large 

 white patches on their inner vanes, fourth and fifth sometimes with white ; 

 wings externally grayish, inner feathers more or less margined with olive- 

 green; median coverts tipped with white on both vanes, greater coverts chiefly 

 on outer vane forming two white wing-bars,; below uniform yellow, the 

 crissum whitish. 



Adult c?, Fall. Similar to last but crown more or less tipped with greenish. 



Young d 1 , Fall. Similar to adult d 1 in Fall, but crown somewhat greener. 



