76 BREWSTER’S WARBLER. 
to discover a chrysoptera mated with a pinus breeding at Portland, Conn., in 
June, 1889. Five young, the issue of this pair, were secured the day they left 
the nest, and they have been kindly loaned to me by Mr. Sage (Coll. J. H. Sage, 
nos. 1321-1325, 207, 3 2; one of these, no. 1321, is represented on the Plate, fig. 4). 
There is but slight variation in color amongst them. They are grayish olive 
on the crown, sides of the head, and back. The chin, throat, breast, and flanks 
are grayish olive, lighter than the back. The median part of the belly yellow. 
Remiges slate brown, edged with whitish and olive. Wing-bars olive-yellow. 
Young H. pinus of the same age, for the use of which I am indebted to Dr. J. 
Dwight, Jr., and Mr. William Brewster,’ are olive on the crown, sides of the head 
and back, yellow-olive on the chin, throat, breast and flanks, yellow on the belly. 
The remiges are slaty brown edged with whitish olive. The wing-bars are olive- 
yellow. Compared with Mr.'Sage’s birds the young pinus are distinctly different, 
being more deeply suffused with yellow throughout. 
I have no skins of the Lexington Brewster’s Warblers in their juvenile 
plumage to compare with the young of pinus and with Mr. Sage’s specimens. 
Since it was my object to determine what each one of the young birds developed 
into as adults, none were killed before attaining the first-winter plumage. Never- 
theless, careful notes of the color of the young birds, taken when they had just 
quit the nest, reinforced by a vivid recollection of their appearance, convince me 
that they were like Mr. Sage’s birds, distinctly grayer than the young of pinus. 
How do these young birds in their juvenile dress, that is, young pinus and Mr. 
Sage’s birds, compare with the young of chrysoptera at the same age? I have 
been able to obtain but two specimens of chrysoptera in juvenile plumage, one 
from Mr. Brewster (No. 4669, Highland Falls, N. Y.) and one from the 
Carnegie Museum, Pittsburg, Pa. (No. 7100, Beaver Co., Pa., W. E. C. Todd),” 
and these are both considerably older and larger than the young pinus and the 
Sage birds, their tails being 1.1 inches in length. The Carnegie Museum speci- 
men is shown on the plate, fig. 2. Their crowns, and the sides of their heads are 
dull olive-brown; back a shade or two darker; chin, throat, breast, fore belly, 
and flanks dull olivaceous ash; middle of belly and vent whitish; tail slate- 
colored with the three external pairs of quills extensively white on the inner 
webs; remiges slaty brown, edged exteriorly with olive, middle and greater 
wing-coverts tipped with yellowish. The black lores of the following first- 
1 One of Dr. Dwight’s specimens is shown in Fig. 3 of the accompanying plate. 
2T would also acknowledge the courtesy of Mr. F. M. Chapman of the American Museum, New 
York, and Mr. H. C. Oberholser of the U. 8S. Biological Survey, Washington, who have sent me skins of 
young Helminthophilae to examine. 
