“THE BREW STER W ARBLER. 123 
No. 53, H. 
BREWSTER WARBLER. 
A. O. U. No. H. 21. Helminthophila leucobronchialis (Brewst.). 
Description.—Adult male: More or less like H. pinus (i. e. forehead and 
forecrown pure yellow, a black line through eye, etc.), but upper parts bluish 
gray (instead of olive-green) ; the wing-bars yellow; under parts pure white, 
tinged on breast only with yellow and on sides with ashy gray. In the fall more 
heavily washed with yellow below, and margined with olive-green above. Adult 
female: Like the male, but yellow of crown not so bright ; wing-bars usually 
white. 
Taken near Oberlin. Photo by the Author. 
A HAUNT OF THE BREWSTER WARBLER. 
The status of this bird is not yet fully determined. It may be a color phase 
of H. pinus or a hybrid between H. pinus and H. chrysoptera or possibly a nascent 
species. Certain it is that its affinities are strongly with H. pinus. Upon this 
point Ridgway’s note is at least suggestive and perhaps solvent, “This puzzling 
bird apparently bears the same relation to H. pinus that H. lawrencei does to 
H. chrysoptera. In a large series of specimens every possible intermediate con- 
dition of plumage between typical H. pinus and H. lewcobronchialis is seen, just 
as is the case with H. chrysoptera and H. lawrencei. If we assume therefore that 
these four forms represent merely two dichroic species, in one of which (H. pins) 
