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678. Geothlypis agilis (Wils.). [118.] Connecticut Warbler. 
This is one of the rarest, and hence one of the most interesting War- 
blers of the Mississippi Valley. In 1883 neither the breeding range 
nor its winter range was known. In 1884 something was learned of its 
summer home, but where it spends the winter is stilla mystery. The 
question of its nest and eggs has been answered by Mr. Ernest E. T. 
Seton (now Ernest E. Thompson), who found a nest on a moss mound 
ina tamarack swamp near Carberry, Manitoba, concerning which he 
published an interesting account in the Auk for April, 1884, page 192. 
He afterwards stated that this nest was found June 21, 1883. Not 
the least interesting fact in the life history of this little-known species 
is its choice of different routes for its spring and fall migrations, pass- 
ing northward along the Mississippi Valley and returning by way of 
New England. It is almost the latest Warbler to migrate in spring, 
coming some time after the Black-polls, which are usually believed to 
bring up the rear of the Warbler hosts. The only observer who noted 
it in 1884 was Mr. Widmann, who found it at Saint Louis May 21, at 
the same spot as in 1882 and 1883. As the birds do not leave latitude 
43° until about June 1, it must be very late before they reach their 
breeding-grounds in Manitoba. . 
In the spring of 1885 the first Connecticut Warbler was seen at Saint 
Louis, Mo., May 15, and the last one week later. 
679. Geothlypis philadelphia (Wils.). [120.] Mourning Warbler. 
In much of the Mississippi Valley the Mourning Warbler is a com- 
panion of the Connecticut Warbler in migration, and hardly less difficult 
to observe. Its life history, however, is well known. It winters south 
of our border and breeds from Minnesota and eastern Nebraska north. : 
ward. It is common in western Manitoba. It has been found nesting 
in Illinois, even south of latitude 39°. In 1884 it was noted by none of 
the southern observers, the first record being that of its arrival at Saint 
Louis May 21. During the next week it was observed at Elk River, 
Minn. At Lanesboro, Minn., May 25,a male was taken with most of 
its breast black. : 
In the spring of 1885 Texas was well represented in the records of the 
Mourning Warbler. It was seen at San Antonio, April 28; at Bonham, 
May 14, and at Gainesville at the very late date of May 22. It reached 
Saint Louis, May 13; Emporia, Kans., May 15; Des Moines, Iowa, May 
15; Lanesboro, Minn., May 18; Elk River, Minn., May 16, and White 
Earth, Minn., May 18. Thus it will be seen that in the northern por- 
tion of its range it is a very rapid migrant. The last at both Saint 
Louis and Des Moines was noted May 22. 
In Concho County, Tex., it is a tolerably common fall migrant, but 
has not been seen later than September 1 (Lloyd). 
680. Geothlypis macgillivrayi (Aud.). [12l.] Macgillivray’s Warbler. 
Along the extreme western edge of the Mississippi Valley this Warbler 
takes the place of the preceding. An exceptionally eastern record was 
