Mr. John Xantus found these birds to be quite abundant at Cape St. Lucas, and obtained several of their nests. They were generally built among the interlacing tendrils of a wild vine (Antigonon leptopus), and so closely interwoven with the smaller branches as to be inseparable. The nests, like those of all this family, are structures of great beauty and delicacy. They have a height and an external diameter of about 2¼ inches. The cavity is 1½ inches wide at the rim, and fully two inches deep. This great proportionate depth of the nest seems to be characteristic of this genus. The external portion of this nest is composed of a composite blending of various vegetable materials, fine hempen fibres of plants, strips of delicate bark from smaller shrubs, silken fragments of cocoons and downy cotton-like substance, all very closely impacted and felted together, somewhat after the manner of the Humming-Bird. The whole is very softly and warmly lined with a beautifully interwoven and silky fabric composed of the soft down of various plants.
The walls of the nest, though of the softest materials, are so thick and so firmly impacted as to make it a structure remarkably firm and secure against accidents.
The eggs, four in number, measure .55 of an inch in length by .45 in breadth. They are of an oblong-oval shape, their ground-color is a pale greenish-white sprinkled over the entire surface with fine dottings of purple, reddish-brown, and black.
Family CHAMÆADÆ.—The Ground-Tits.
Char. Bill compressed, short, rather conical, not notched nor decurved. Culmen sharp-ridged. Nostrils linear, with an incumbent scale. Rictal bristles reaching beyond nostrils, which are scantily overhung by bristly feathers. Loral feathers bristly and directed forwards. Tarsi booted, or covered with a continuous plate anteriorly, with faint indications of scutellæ on the inner side. Basal joint of middle toe attached for about half its length on either side. Primaries ten; sixth quill longest. Plumage very lax.
Chamæa fasciata.
5924
We have found it impossible to assign the genus Chamæa to any recognized family of American birds, and have accordingly been obliged to give it independent rank in this respect, although it may properly belong to some Old World group with which we are not acquainted. In its general appearance it approaches the Paridæ in loose plumage, bristly lores, want of notch to bill, etc.; but differs in the very much bristled rictus, sharp-ridged culmen, linear nostrils, booted tarsi, less amount of adhesion of the toes, etc. It approaches the Sylviidæ in the sharp-ridged culmen and bristly gape, but is otherwise very different. The excessively rounded wing is a peculiar feature, the sixth primary being the longest.
