BLUE- WINGED YELLOW WARBLER. 103 



however, to seize other insects when they come within reach. It remains 

 ahnost constantly among the bushes, and is seldom seen on trees of any 

 size. 



Sylvia solitaria, Ch. Bonaparte, Synops. of Birds of the United States, p. 87. 

 Blue-winged Yellow Wakbler, Wils. Amer, Ornith. vol. ii, p. 109. PI. 15. Fig.4. 



Adult Male. Plate XX. Fig. 1. 



Bill nearly as long as the head, straightish, subulato-conical, acute, 

 as deep as broad at the base, the edges acute, the gap line a little de- 

 flected at the base. Nostrils basal, lateral, elliptical, half-closed by a 

 membrane. Head rather small. Neck short. Body slender. Feet of 

 ordinary length, slender ; tarsus longer than the middle toe, covered an- 

 teriorly by a few scuteUa, the uppermost long ; toes scutellate above, the 

 inner free, the hind toe of moderate size ; claws slender, compressed, 

 acute, arched. 



Plumage soft, blended, tufty. Wings of ordinary length, acute, the 

 second quill longest. Tail longish, rounded when expanded, slightly 

 forked when closed. 



Bill black, with a pale margin. Iris dark brown. Feet and claws 

 flesh-colour, tinged with yellow. Forehead, crown, and under parts of a 

 rich bright-yeUow. Back of the head and neck, the back and upper tail 

 coverts bright grass-green. Lore black. Wings greyish-blue, shghtly 

 margined with paler, the first two rows of coverts tipped with whitish. 

 Four middle tail-feathers greyish-blue, the outer webs of the rest, and an 

 oblique portion of the outer feather at the end, of the same colour, their 

 inner webs white.. 



Length 4| inches, extent of wings 7 ; bill along the ridge i, along 

 the gap 1. 



Adult Female. Plate XX. Fig. 2. 



The female scarcely differs from the male in appearance, and is of near- 

 ly the same dimensions. 



