142 THE YELLOW-THROATED VIREO. 



Pennsylvania and New Jersey about the end of April, and in Massachusetts 

 and Maine about a month later. 



The nest of the Yellow-throated Vireo is truly a beautiful fabric. It 

 sometimes extends to five or six inches in depth, and as it is always placed 

 at the extremity of small twigs, it is very conspicuous. It is attached to 

 these twigs with much care by slender threads of vines, or those of other 

 trees at its upper edges, mixed with the silk of different caterpillars, and 

 enclosed with lichens, so neatly attached by means of saliva, that the whole 

 outer surface seems formed of them, while the inner bed, which is about 

 two and a half inches in diameter, by an inch and a half in depth, is lined 

 with delicate grasses, between which and the bottom coarser materials are 

 employed to fill the space, such as bits of hornets' nests, dry leaves, and 

 wool. The eggs, which are four or five in number, are of an elongated form, 

 white, spotted with reddish-brown or black. The young are out about the 

 beginning of July. In Maine it raises one brood only, but farther south not 

 unfrequently two. 



Yellow-throated Flycatcher, Muscicapa sylvicola, Wils. Amer. Orn., vol. ii. p. 117. 

 Vireo flavifrons, Bonap. Syn., p. 70. 

 Yellow-throated Vireo, Nutt. Man., vol. i. p. 302. 



Yellow-throated Flycatcher or Vireo, Vireo flavifrons, Aud. Orn. Biog., vol. ii. p. 

 119; vol. v. p. 428. 



Male. 



Upper parts light green, the rump, scapulars, and smaller wing-coverts 

 bluish-grey; quills and coverts brownish-black; two bands of white on the 

 wing, formed by the tips of the secondary coverts and first row of small 

 coverts; primaries narrower, edged with yellowish-green, secondaries broadly 

 with white; tail-feathers brownish-black, the outer edged with white; sides 

 of the neck yellowish-green; a line over the eye, throat, and breast yellow, 

 the rest of the lower parts white. 



Male, 5|, 9£. 



From Texas to Nova Scotia. Rare in the interior, more abundant in the 

 middle Atlantic districts. Migratory. 



The egg of this bird measures thirteen-sixteenths of an inch in length, by 

 five-eighths, is of a slightly elongated form, oval, from the smaller end being 

 rather rounded, and is marked with a few scattered spots of a deep brownish- 

 crimson, on a beautiful flesh-coloured ground. 



In a male preserved in spirits, the roof of the mouth is slightly concave, 

 with two palatal ridges, and an anterior median ridge; the posterior aperture 

 of the nares is linear-oblong, 5 twelfths in length, its margins papillate. The 

 tongue is rather short, 4^ twelfths long, narrow, triangular, very thin, 



