CHESTNUT-SIDED WARBLER. 235 
The Blackburnian is rather common in the Atlantic States and 
westward to the Plains, breeding chiefly north of 45°, and sparingly 
in Massachusetts and Connecticut. It winters from the Bahamas 
and eastern Mexico southward. 
Many Canadian observers have considered this Warbler rather 
rare, but the opinion has probably arisen from the secluded habits 
of the bird while in its summer home. It shows a preference for 
the higher branches, and its favorite haunts are amid the deeper 
forests’ where the pine and hemlock flourish. 
CHESTNUT-SIDED WARBLER. 
DENDROICA PENSYLVANICA. 
Cuar. Back black, streaked with olive of grayish or yellowish tint; 
crown yellow; sides of head white, enclosing a patch of black ; sides of 
neck and entire under parts white; sides streaked with chestnut, which 
extends from neck to flanks ; wing-bars and blotches on tail white. Length 
434 to 54 inches. 
Vest. On the edge of an open woodland or the margin of a moist 
meadow, in low tree or bush; composed of grass and strips of bark fas- 
tened with insect silk, and lined with grass or leaves or hair. 
£iggs. 4-5; white or creamy, spotted, chiefly around the larger end, 
- which is sometimes wreathed, with reddish brown and lilac ; 0.68 X 0.50. 
This rare and beautiful Sylvia, which probably winters in 
tropical America, appears in the Middle and Northern States 
early in May on its way north to breed; it is also seen in the 
spring in Canada and around Hudson’s Bay. A few pairs re- 
main, no doubt, to rear their young in secluded mountainous 
situations in the Northern States, as on the 22d of May, 
1830, a pair appeared to have fixed their summer abode 
near the summit of the Blue Hills of Milton. The note of the 
male was very similar to that of the Summer Yellow Bird, being 
only a little louder, and less whistling ; it resembles ’Zsh ‘¢sh 
‘ssh *tshyia, given at about an interval of half a minute, and 
answered by his mate at some distance, near which, it is proba- 
ble, there was a nest. He appeared to be no way suspicious 
of our approach ; his restlessness was subdued, and he quietly 
sat near the same low bushes, amusing himself and his consort, 
for an hour at a time, with the display of his lively and simple 
