errs aul General Notes. 481 
abundant and it is quite possible that this rarer subspecies may have been 
overlooked and confused with the migratory bird. 
The nest was situated on the horizontal branch of a small mesquite 
bush in an abandoned cornfield. Being only about three feet from the 
ground it was well concealed by the rather tall grass and some vines of a 
little blossoming passion flower. The situation of the old cornfield was near 
the river bank which accounts, in this dry section of the State, for the 
grass and other green growth. 
Upon discovery the parent bird was not present and a long watch was 
necessary before she made her appearance. Upon arrival she went at 
once to her nest, from which she was driven and shot. 
Three fresh eggs were found in the nest, and dissection of the parent 
proved that the set was complete. The eggs appear to be pure white in 
color when unblown and exposed to the direct rays of the sun, but upon 
being emptied show a very delicate blue, lighter than that of our Eastern 
Bluebird. Through an accident two of these eggs were badly broken 
before our arrivalhome. The specimen not broken measures 23 17 mm. 
The nest was well constructed and, roughly speaking, about 100 to 110 
mm. in height and about the same in width. The coarser part, or founda- 
tion, is constructed of dried leaves, some finer portions of corn husks and, 
worked in through from one side to the other, the shed skin of a rather 
large snake. Forming the outer layer of this foundation are some dried 
weed stalks which are apparently held in position by coarse spider webs 
wound about the exterior after they have been placed in position. The 
nest proper is very neatly constructed of fine grass stems and lined with 
fine rootlets, yellow in color. The bowl of the nest is about 51 mm. deep 
and 60 mm. wide. 
The parent is in full breeding plumage, and, unlike Ridgway’s descrip- 
tion, is lighter in color than specimens of G. c. lazula, especially below. 
It also shows washings of blue on the ear coverts and wings.— P. W. 
SHuUFELDT, Tehuantepec, Oaxaca, Meczico. 
Brewster’s Warbler (Vermivora leucobronchialis) in Lexington, 
Mass.— In ‘ The Auk’ for October, 1907, I recorded a Brewster’s Warbler 
found during the summer of that year in a swamp in Lexington, Mass. 
In the decade that has since elapsed, this bird has been found established 
in the same swamp every summer except that of 1909, when no search 
was made for it. In 1910 and 1913, Dr. W. M. Tyler and I made a careful 
study of this hybrid and its relations with the Golden-winged Warbler 
(V. chrysoptera) and the Blue-winged Warbler (V. pinus). The results 
of our observations were published by me in the Memoirs of the Museum 
of Comparative Zoélogy, Vol. XL, Nos. 2 and 6, January 1911 and August, 
1913. The persistence of this hybrid form in the same locality through 
so many consecutive years is in itself well worthy of record; I wish, too, 
to summarize the knowledge acquired relative to the matings of these 
birds and the duration of the nestling period. 
