In regard to their breeding in Pennsylvania, Mr. Nuttall mentions in the second edition of his work that he met them among the Alleghanies at Farranville in full song, and had no doubt that they were nesting there at the time. The Chestnut-sided Warbler usually constructs its nest in localities apart from cultivated grounds, on the edges of low and swampy woods, but in places more or less open. Quite a number of their nests have been met with by Mr. George O. Welch, of Lynn, Mass. Their more common situation has been barberry-bushes. The nests vary from about two and a half to three and a half inches in external height, and have a diameter of from three to four inches. The cavity is about two inches deep. They are usually composed externally of loosely intertwined strips of the bark of the smaller vegetables, strengthened by a few stems and bits of dry grasses, and lined with woolly vegetable fibres and a few soft hairs of the smaller animals. They are usually very firmly bound to the smaller branches by silky fibres from the cocoons of various insects. These nests were all found in open places, in low, wild marshy localities, but none far from a cultivated neighborhood, and the situations chosen for the nests do not differ materially from those usually selected by the common _D. æstiva_. The eggs of this Warbler are of an oblong-oval shape, have a ground-color of a rich creamy-white, and are beautifully spotted, chiefly about the larger end, with two shades of purple and purplish-brown. They measure .65 by .49 of an inch. Dendroica striata, BAIRD. BLACK-POLL WARBLER. _Muscicapa striata_, FORSTER, Phil. Trans. LXII, 383, 428. _Motacilla s._ GMELIN. _Sylvia s._ LATH.; VIEILLOT; WILS.; BON.; NUTT.; AUD. Orn. Biog. II, pl. cxxxiii.—LEMBEYE, Av. Cuba, 1850, 33. _Sylvicola s._ SWAINSON; BON.; AUD. Birds Am. II, pl. lxxviii.—REINHARDT, Vid. Med. for 1853, 1854, 73 (Greenland).—MAX. Cab. Jour. VI, 1858, 113. _Mniotilta s._ REINH. Ibis, 1861, 6 (Greenland). _Rhimanphus s._ CAB. Jour. III, 475 (Cuba). _Dendroica s._ BAIRD, Birds N. Am. 1858, 280; Rev. 192.—COUES, Pr. A. N. Sc. 1861, 220 (Labrador coast).—GUNDL. Cab. Jour. 1861, 326 (Cuba; rare).—SAMUELS, 233.—DALL & BANNISTER (Alaska). _? D. atricapilla_, LANDBECK, Wiegmann’s Archiv, 1864, 56 (Chile). Other localities quoted: _Bogota_, SCLATER, P. Z. S. 1855, 143. _Bahamas_, BRYANT, Pr. Bost. Soc. VII, 1839.