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.^) 



E^g'^- — 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.51; extremes, .73X.55, .58X.51, 

 .61X.48. (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 29-May 31 (Bishop) ; Monroe County, Mich., 

 May 17- June 18 (/. 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, 311. (3) J. P. N[0RRis], A Series of Eggs of the Golden-winged 

 Warbler, Orn. and 061., XV, 1890, 21. (4) J. H. Sage, Notes on Helmin- 

 thophila chrysoptera in Connecticut, Auk, X, 1893, 208. (s) 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.) Pl.te 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, 

 2.4s; tail, i.8s; bill, .46. 



Adult c?. 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 3, Fall. — Similar to last but crown more or less tipped with greenish. 



Young <?, Fo//.— Similar to adult c? in Fall, but crown somewhat greener. 



