This species has greenish upper parts, white lower parts and superciliary line, and gray crown and nape. They nest either on the ground or at low elevations in bushes, making the structure of grasses and fibres, lined with hair; they are found on wild, tangled hillsides and mountain ranges. The eggs are pure white, sparingly specked with reddish brown. Size .62 × .45. 648. PARULA WARBLER. _Compsothlypis americana americana._ Range.--Eastern United States, breeding in the southern half. The upper parts of this handsome species are bluish gray with a greenish patch in the middle of the back; the throat and breast are yellow with a patch of black and chestnut. They are abundant birds in suitable localities, breeding in swamps, especially those with old or dead trees covered with hanging moss (usnea). The nests may be found at any height from the ground, and are usually made by turning and gathering up the ends of the hanging moss to form a pocket, which is lined with fine grass or hair. The four to six eggs are white or creamy white, wreathed with specks of reddish brown and chestnut. Size .64 × .44. 648a. NORTHERN PARULA WARBLER. _Compsothlypis americana usneæ._ Range.--Northern half of eastern United States and southern Canada; winters from the Gulf States southward. The nesting habits of the northern form of the Blue-yellow-backed Warbler are in all respects like those of the last, and like them, where moss grown swamps are not to be found, they have been known to construct nests of moss suspended from branches of trees, or to nest in bunches of dead leaves. Data.--Oxford, Mass., June 7, 1895. Nest in a dead pine swamp; made in end of hanging moss about 6 feet from the ground. Large colony breeding. [Illustration 392: White.] [Illustration: White.] [Illustration: Tennessee Warblers. Olive Warblers.] [Illustration: left hand margin.] Page 391 649. SENNETT'S WARBLER. _Compsothlypis piti ayumi nigrilora._ Range.--Eastern Mexico, north to the Lower Rio Grande Valley in Texas. This species is similar to the Parula but is more extensively yellow below, and has black lores and ear coverts. Their habits are the same as those of the last and their nests are generally placed in hanging moss, and are also said to have been found hollowed out in the mistletoe which grows on many trees in southern Texas, New Mexico and Arizona. The eggs cannot be distinguished from those of the last. 650. CAPE MAY WARBLER. _Dendroica tigrina._ Range.--Eastern North America, breeding from northern New England and Manitoba northward; winters south of the United States.