BIRDS OF MINNESOTA. 397 
larger end. Their habits preclude much familiarity with them, 
and little more is known of them than when first identified and 
described. They remain here until about the first week in 
October. 
SPECIFIC CHARACTERS. 
Bill from rictus, about the length of the skull. Above olive 
brown, with a shade of green; beneath pale, sulphur yellow, 
brightest on the abdomen. Region about the base of the lower 
mandible, and a superciliary line from the base of the bill to 
the nape, brownish yellow. A dusky line from the bill through 
the eye; chin and throat, finely spotted. All the remaining 
under parts and sides of body except the abdomen, and includ- 
ing the under tail coverts, conspicuously and thickly streaked 
with olivaceous brown. almost black on the breast. 
Length, 6.15; wing, 3.12; tail, 2.40. 
Habitat, eastern to arctic America. 
Nore. Neither Mr. Washburn nor Mr. Lewis in the north, 
nor Dr. Hvoslef in the south part of the State have referred 
to this species in their correspondence. I have, however, 
found it to be resident in many localities by the specimens 
sent me fcr identification. 
GEOTHLYPIS AGILIS (Witson). (678.) 
CONNECTICUT WARBLER. 
In June, 1869, in a thicket by the wayside in the suburbs of 
the city, I collected two birds from the same bush, one of 
which proved to be of this species and the other was the 
Mourning Warbler (G. Philadelphia). Both were then new to 
Minnesota ornithology, and of course it was a great find. 
Since that time I have seen them in both migrations nearly 
every year, but have only occasionally met with them during 
the summer, as on that first discovery of them, and then along 
the Red river near Fargo and Moorhead. Agilis seems to be 
the rarer of the two species, the nest of which I have never 
yet seen, nor have I been apprised of its discovery by anyone 
else. Mr. U. S. Grant found several of these warblers in St. 
Louis county in July, which not only corroborates its breeding 
habits affirmed, but shows that they are by no means confined 
to the vicinage of the Red river. Soon after the frosts begin 
to intefere with their food supply, the migration southward 
commences, which is not closed for fifteen to twenty days or- 
dinarily. At such times they frequent thickets along con- 
tinued banks, and sides of the hills, much after the manner of 
sparrows, but are driven into trees more readily. 
