158 LAND-BIRDS AND GAME-BIRDS 
always pensile, but Audubon speaks of one fastened to the 
trunk of a tree, in which situation I have never found it, so 
far as Iremember. The eggs of the Warbling Vireo are white, 
with a few ‘*‘reddish-black” or brown spots at the larger end, 
and average about ‘77°58 of an inch. A set of four or five 
is laid near Boston in the first week of June. 
(c). The Warbling Vireos reach Eastern Massachusetts in 
the second week of May, and leave it in the same week of 
September. They are common in many parts of our State, 
and I have seen them in Northern New Hampshire, but in 
Fig. 6. Warbling Vireo (3). 
some localities they are very rare. Though they do not, I 
think, show quite so much familiarity towards man (at least 
here), as some authors have represented, yet they are certainly 
to be found, to some extent, in cities, towns, villages, and 
thickly populated neighborhoods — for instance among the elms 
of Boston Common. Though occasionally seen in the haunts 
of the Yellow-throated Vireos (B), they seem to be particularly 
fond of rows of, or solitary, elms, poplars, and basswood trees 
—particularly those beside roads or near houses. They usu- 
ally remain among the higher branches as they search for 
insects; and, on account of their size and quiet colors, they 
might easily be overlooked, were it not for their music. 
(d). Their ordinary notes are like those of the Red-eyed 
Vireos, but less loud and querulous. Their song is exquisitely 
sweet, and, though quite distinct, recalls vividly that of the 
Purple Finch (§ 15, III). Dr. Coues, in speaking of the War- 
