486 NORTH AM ERICA y BIRDS. 



usually nearly confluent, pi-odueing a nearly continuous patch ; 

 adult female with throat and ear-coverts deep gray. Etjgs .64 X -53, 

 white, finely — u.sually g])arsely and rather minutely — speckled with 

 brown, chiefly on or round larger end. Hah. Eastern United Stales 

 and British Provinces, breeding from about 40° northward; winter- 

 ing in Cuba, eastern Mexico, Central America, and Colombia. 



642. H. chrysoptera (Linn.). Golden-winged Warbler. 

 c'. Cheeks and lower parts pure gamboge-j'cllow, the sides tinged with 

 olive ; back, scapulai's, and rump bright olive-green ; wing-bands 

 (usually, at least) white, narrower and more widely separated ; 

 adult female with throat and cheeks dusky olive-greenish. Hab. 

 Northeastern United States (New Jersey, etc.). 



— . H. lawrencei (IIeruick). Lawrence's Warbler." 



b'. Throat entirelj- pure yellow or white, in both sexes; ear-coverts olive-green 



or light ash-gray for upper half, pure yellow or white for lower half; a 



narrow black streak behind eye. 



c'. Ilind-neck. back, scapulars, and rump bright olive-green ; lower parts 



(including sides of head, except as described) pure gamboge-yellow, 



the sides and flanks tinged with olive-green ; wing-bands usually 



white, extremely variable as to width (sometimes nearly confluent, 



more rarely almost obsolete). Eggs .60 X -48, white, finely — usually 



minutely and rather sparsely — speckled with brown and black, 



chiefly on or round larger end. Hab. Eastern United States, north 



to Connecticut Yalley, southern New York, the Great Lakes, and 



Minnesota (but chiefly west of Alleghanies, except north of 40°); 



south, in winter, through eastern Mexico to Costa Rica. 



641. H. pinus (Linn.). Blue-winged Warbler, 

 c*. Hind-neck, back, scapulars, and rump ash-gray; lower parts, including 

 sides of head, upward nearly to eye, pure white, usually tinged on 

 breast (sometimes on chin also) with yellow, the sides and flanks 

 tinged with ash-gray; wing-bands cither yellow or white, broad or 

 nan-ow. Hab. Eastern United States (Virginia, New Jersey, New 

 York, Connecticut, Massachusetts, Michigan, etc). 



. H. leucobronchialis (Brewst.). Brewster's Warbler.' 



1 Doubtless cither a hybrid of 7?. chrysoptera an.l H. p!m,>, or else ft yoUow dichromatic phase of the 

 icr. The latter supposition seems, in the light of recently studied material, to be the more probable solu- 

 ion of tho case. 



« This puzilins bird apparently bears the same relation to IT. p!,«,« that Ff. hxrrrncei does to H. chri/tnp- 

 'rn. In a large fcricii of specimens, every possible intermediate condition of plumage between typical H. 

 >MM.. and n. lencobronchHil.s is seen, just aa is tho case with If. chr;,„plrnt and //. lawrencei. If wo assume, 

 hercfore, that these four forms represent merely two dichroic species, in one of which (H. ;>ini..) tho xan- 

 Jiochroie (yellow) pl"^'" ""'1 i" ""> »"""" <■"■ <•'"■.'/«"/<"'•'•) "'c leucochroic (white) phase represents the 

 normal plumage.— and admitting thnt these two species, in their various conditinns, hybridize (which seems to 

 .0 an incontrovertible fact),— wo have nn easy and altogether plausible explanation of tho origin of the almost 

 nterminably variable scries of specimens which have found their way into the " waste-basket" labelled '•//. 

 ,6ronc/i.Vi/i.." 



