The entire crown, from the bill to the upper part of the back, coming down on the sides to the lower level of the eye, is pure black, although the edge alone of the lower eyelid is of this color. A second black patch begins at the lower mandible and occupies the entire under surface of the head and throat, but not extending as far back within a quarter of an inch as that on the upper part of the neck. The space between these two patches, on the sides of the head and neck, is white, this color extending along the black of the back of the neck as far as its truncated extremity, but not bordering it behind. The middle of the breast and belly, as far as the vent, is dull white, that immediately behind the black of the throat a little clearer. The sides of the breast and body under the wings, with the under tail-coverts, are pale, dull brownish-white. The back, rump, and upper tail-coverts are of a dirty bluish-ash, washed with yellowish-brown, especially on the rump. The wings are brown; the outer edges of the third to the seventh primaries narrowly edged with whitish; the innermost secondaries more broadly and conspicuously edged with the same; larger coverts edged with dirty whitish. Outer webs of tail-feathers edged with white, purest and occupying half the web in the external one, narrowing and less clear to the central feathers, the basal portions, especially, assuming more the color of the back. HABITS. The common Chickadee or Black-capped Titmouse is so well known throughout the greater portion of the United States as to be generally accepted, by common consent, as the typical representative of its numerous family. Until recently it has been supposed to be universally distributed over the continent, and while this is now questioned, it is not quite clear where its limits occur. In Eastern Maine the _Parus hudsonicus_ and this species meet. In the District of Columbia it crosses the northern limits of _P. carolinensis_, and in the northern Mississippi Valley it mingles with the var. _septentrionalis_. It remains to be ascertained how far the species exceeds these bounds. A few individuals of this species were observed by Mr. Dall, December 12, at Nulato, where, however, it was not common. They were also obtained by Bischoff at Sitka and Kodiak. As in very many essential respects the whole family of _Paridæ_ are alike in their characteristics of habits, their manner of collecting food, their restless, uneasy movements, the similarity of their cries, their residence in hollow trees or branches, and their nesting in similar places, with the exception only of a few species that construct their own pouch-like nests, we have taken the best known as the common point of comparison. Except in the variations in plumage, the points of difference are never great or very noticeable.