CHARACTERS OP HELMINTHOPHAGA PEREGRINA 231 



vegetiores, supra flavo-olivascentes, subtus virenti-albidce. Long, 

 tot. 4J-4|, alw 2|, caudcB l|-2. 



^, adult: Upper parts yellowish-olive, brightest posteriorly ; on the fore 

 parts and head changing to pure ash, without any greenish tint whatever. 

 No crown-patch of any different color. Lores, eye-ring, or frequently a decided 

 superciliary stripe, whitish. Entire under parts dull white, scarcely or not 

 tinged with yellowish. Wings and tail dusky, strongly edged with the color 

 of the back, the outer tail-feathers frequently with an obscure whitish spot. 

 Bill and feet dark. Length, 4i-4|; wing about 2f, long and pointed, the 

 first quill as long as the next, and little difference between the first three or 

 four quills. Tail extremely short, only two inches or less; such comparative 

 lengths of wing and tail probably always serving to identify the species. 



2 , adult : Quite like the male, but the ashy of the head less pure and clear, 

 and the whole under parts more or less tinged with greenish-yellow. 



Yonng : Entire upper parts strongly and uniformly yellowish-olive, like 

 the back of the adult male, or even greener, this color also tinging the eye- ■ 

 ring and superciliary stripe. Whole under parts like those of the adult 

 female, or even more decidedly greenish-yellow, leaving only the belly and 

 criesnm whitish. In such case, the species more closely resembles some 

 others than the adults do ; but the short tail, long wings, and absence of 

 crown-patch, are distinctive. 



THE Tennessee Warbler is scarcely entitled to a place here. 

 Yet its westward dispersion is wider than is generally 

 known or supposed, and there is no question that it reaches the 

 Eocky Mountains of Colorado. There is an old record of the 

 finding of the bird on the Upper Missouri by Mr. J. G. Bell, 

 the famous taxidermist of New York, who accompanied Audu- 

 bon up the river; and the Prinz Maximilian von Neu Wied 

 described it from the same region under the name of " Sylvicola 

 missuriensis". I have myself only found it along the eastern 

 border of Dakota, where, however, it is extremely abundant 

 during the migration, which is concluded in that latitude during 

 the fore part of June. It is one of the numerous Eq,stern birds 

 first discovered in Colorado by Mr. C. E. Aiken, who took it in 

 El Paso County of that State, along with such decidedly East- 

 ern species as Wilson's Bluebird, the Blue Yellow-backed 

 Warbler, the Indigo-bird, Baltimore Oriole, Carolina Wood- 

 pecker, and the Dusky Duck {Anas obscura). No one else ap- 

 pears to have met with it so far west, nor has it yet been found 

 fairly within the watershed of the Colorado. I consider it one 

 of the less abundant Warblers of the Atlantic States ; it is cer- 

 tainly much more numerous in the Valley of the Mississippi, its 

 main belt of migration both in spring and fall. It is one of the 

 three Helminthophagce which proceed far beyond the United 



