Crown and ear coverts black, underparts and line over eye yellow; no white in the plumage. These birds are found in about such localities as are frequented by Oven-birds, but with a preference for woods which are low and damp. They are locally common in some of the southern and central states. They are active gleaners of the underbrush, keeping well within the depths of tangled thickets. Like the Maryland Yellow-throat, which has similar habits to those of this bird, they are quite inquisitive and frequently come close to you to investigate or to scold. They nest on the ground in open woods or on shrubby hillsides, making large structures, of leaves and strips of bark, lined with grasses. The eggs are white, sprinkled with dots or spots of reddish brown and gray. Size .70 × .55. Data.--Greene Co., Pa., May 26, 1894. 4 eggs. Nest a mass of leaves, lined with rootlets, placed on the ground at the base of a small elm sprout in underbrush on a hillside. 678. Connecticut Warbler.--_Oporonis agilis._ Range.--Eastern United States; known to breed only in Manitoba and Ontario. These birds have greenish upperparts and sides, yellowish underparts, and an ashy gray head, neck and breast; they have a complete whitish ring about the eye, this distinguishing them in any plumage from the two following species. As they do most of their feeding upon the ground and remain in the depths of the thickets, they are rarely seen unless attention is drawn to them. They are quite abundant in New England in fall migrations, being found in swampy thickets. They have been found breeding in Ontario by Wm. L. Kells, the nest being on the ground in the woods among raspberry vines. It was made of leaves, bark fibres, grass, rootlets and hair. The eggs are white, specked with brown and neutral tints. Size .75 × .55. [Illustration 412: White.] [Illustration: Kentucky Warbler. Connecticut Warblers.] [Illustration: deco.] [Illustration: Left hand margin.] Page 411 679. MOURNING WARBLER. _Oporornis philadelphia_. Range.--Eastern United States, breeding from northern New England, Pennsylvania, (Philadelphia) and Nebraska northward. Very similar to the last but with no eye ring and a black patch on the breast. The habits and nesting habits of this species are very similar to those of _agilis_, the nest being on or very close to the ground. With the exception of on mountain ranges it breeds chiefly north of our borders. The eggs are white, specked with reddish brown. Size .72 × .55. They cannot be distinguished from those of the last. Data.--Listowell, Ontario, June 5, 1898. Nest in a tuft of swamp grass in low ground; not very neatly made of dry leaves, grasses and hair. Collector, Wm. L. Kells. (Crandall collection.) 680. MACGILLIVRAY WARBLER. _Oporornis tolmiei._ Range.--Western United States from the Rockies to the Pacific, breeding north to British Columbia; winters in Mexico and Central America.