42 
BLACK-THROATED GREEN WOOD-WARBLER. 
white bands, the quills edged with brownish-white, the two outer tail- 
feathers with a white patch on the inner web ; the lower parts dull white, 
tinged on the neck with yellow, on the sides with greyish-brown. 
Male, 54, 84. 
Middle districts. Rather common. Migratory. 
The Dwarf Maple. 
AoEE SPIOATUM. 
This is a low shrubby tree, which does not attain a greater height at most 
than fifteen or twenty feet. It abounds along the rocky margins of creeks or 
rivers, especially those meandering at the bases of the Alleghany mountains. 
BLACK-THROATED GREEN WOOD-WARBLER. 
SYLVICOLA VIRENS, Lath. 
PLATE LSXXIY. — Male and Female. 
I have traced this species from the Texas to Newfoundland, although at 
considerable intervals, along our Atlantic coasts, it being of rare occurrence 
or wanting in some parts, while in others it is abundant; but in no portion of 
the United States have I met with it so plentiful as around Eastport in 
Maine, where I saw it in the month of May. Many remain all summer in 
that State, as well as in Massachusetts, and the northern parts of New York ; 
and some are found at that season even in the higher portions of Pennsyl- 
vania. On the coast of Labrador it was not observed by me or any of my 
party, and it is not mentioned by Dr. Richardson as having been seen in the 
Fur Countries. Its habits are intermediate between those of many of our 
Warblers and the Vireos, the notes of which latter it in a great measure 
assumes. It usually makes its appearance in Maryland aiid New Jersey about 
the first week of May, when it is observed to be actively engaged in search- 
ing for food, regardless as it were of the presence of man. Its movements 
when proceeding northward are rapid, and it advances through the woods 
solitarily or nearly so, it being seldom that more than two or three are found 
together at this time, or indeed during the breeding season, at which pdriod 
each pair appropriates to itself a certain extent of ground. Its retrograde 
