On the other hand, Mr. Audubon claims to have seen its nest, of which he gives a very different account. He describes it as very prettily constructed, like the nests of any other of this genus, its outer parts made of dry lichens and soft mosses, the inner of silky substances and fibres of the Spanish moss. The eggs are said to be four in number, with a white ground-color and a few purple dots near the larger end. He thinks they raise two broods in a season in Louisiana. These nests are not pensile, but are placed on the horizontal branch of the cypress, from twenty to fifty feet above the ground. It closely resembles a knot or a tuft of moss, and therefore is not easily discovered from below. A nest containing a single egg, found by Mr. Gosse near Neosho Falls, and supposed to belong to this species, but not fully identified, was built in a low sapling a few feet from the ground, and is a very neat structure, such as is described by Audubon. The egg is pure crystal-white, oblong and pointed, and marked with purple and brown. Mr. Ridgway informs me that in Southern Illinois, at least in the valley of the Lower Wabash, the Yellow-throated Warbler may be said to be at least a regular, though not common, summer sojourner. Though it inhabits chiefly the swampy portions of the bottom-lands, it makes frequent visits to the orchards and door-yards, less often, however, in the breeding than in the migrating season. In its manners it is almost as much of a Creeper as the _Mniotilta varia_, being frequently seen creeping not only along the branches of trees, but over the eaves and cornices of buildings, with all the facility of a Nuthatch. Eggs supposed to be of this species, taken near Wilmington, N. C., by Mr. Norwood Giles (16,199, Smith. Coll.), have a ground-color of dull ashy-white, with a livid tinge. They are thickly speckled, chiefly around the larger end, with irregular markings of rufous, and fainter ones of lilac interspersed with a very few minute specks of black. They are broadly ovate in form, and measure .70 by .55 of an inch. Dendroica graciæ, COUES. ARIZONA WARBLER. _Dendroica graciæ_ (COUES), BAIRD, Rev. Am. Birds, I, April, 1865; p. 210.—ELLIOT, Illust. Birds N. Am. I, vi.—COOPER, Orn. Cal. 1, 1870, 563 (Appendix).