WHITE-BROWED YELLOW-THKOATED WARBLER. 261 



lids and infraooular orescent white Other under parts and two bars on wings white, 

 sides streaked with black. Bill (from nostril) 35, tarsns 60, wing 2.70, tail 2.20. 



The above description is Mr. Eidgway's. Var. domiriMia differs from albilora in having 

 the "superciliary stripe anterior to the bill wholly bright yellow, yellow of chin and 

 maxillise extending to the bill," and in the following measarements: bill (from nostril) 

 .45, wing 2.60, tail 2. 



Habitat, var. albilora, in summer, Mississippi region of United States, north to Lake 

 Erie, and Detroit, Michigan ; in winter, Mexico, Guatemala, Yucatan and Colima. 

 Var. tU>mi%%ea, Atlantic United States north to Washington, D. C. Conneoticnt. Massa- 

 chusetts. West Indies. 



I apprehend that few of our specimens of var. albilora will he found to 

 correspond exactly in coloration with the type described by Mr. Ridg- 

 way. I have never seen a spring specimen which had no trace of yellow 

 in the loral line. Some are entirely white on one side, but have yellow 

 on the other. Usually the middle of the loral line on both sides is yellow. 

 The same remarks apply to the white bordering the maxillae. Some 

 young birds in August and September show the loral line entirely white 

 on both sides. On the other hand, the presence of some white in the 

 loral line of all our specimens, and the measurements, readily distin- 

 guish them from typical dominica 



Not rare summer resident ; common during the spring migration. This 

 is the first of the family to arrive in spring. It is always to be seen be- 

 fore the Yellow-rumped and Yellow Warblers make their appearance, 

 sometimes before the last snow and i(5e. I have seen them in consider- 

 able numbers on the 13th of April, and have known of its occurrence as 

 early as April 9th. When on their migrations they confine themselves 

 almost exclusively to the trees which skirt the streams, and move north- 

 ward by day with considerable rapidity. During the whole day their 

 characteristic song, tswee-a, tswee-a, tswee a, tswee, tswee, tswee, tu-wce, may be 

 heard, sometimes at a distance of a quarter of a mile, as the birds feed 

 in the sycamore and elm trees. At such times their capture is a matter 

 of some difficulty, as they spend most of their time in the topmost branches 

 of the tall sycamores or far out over the water. They seem to delight in 

 bafHing pursuit by flying from one clump of trees to another on the opposite 

 side of the stream. For this reason, the better plan is to wait for them in 

 some sycamore grove or under a budding elm. They are seldom seen in 

 woodland, though they not unfrequently visit the shade trees and gardens 

 of the city. They are much more abundant during the spring migration 

 than at any other time. In this locality it is not uncommon to see a 

 dozen in a morning's walk, about one third of which may be captured. 

 I have had no opportunity of observing the bird elsewhere except at Co- 

 shocton, where the Walhonding and Tuscarawas Rivers unite to form the 



