Colors. _Adult._—Superciliary stripe over the eye, and another from the corner of the lower mandible, white. Large space on the throat and neck before black, which is also the color of the lores. Cheeks and entire upper parts brownish-cinereous, darker, and tinged with olive on the back; quills hair-brown, with nearly white external edgings; tail feathers brownish-black, the two central palest, and the external feather, with its outer web, white, and with a large spot of white on its inner web, near the tip,—in some specimens the two outer tail feathers are largely tipped with white. Entire under parts white, tinged with ashy and olive, especially on the sides and flanks; bill dark bluish or horn color; feet dark. _Young._—Throat and other under parts white, with some longitudinal stripes of brownish-black; upper parts as in adult, but more tinged with brown; wing-coverts edged with brownish-white. Hab. New Mexico and Texas; Mexico. Spec. in Mus. Acad., Philada., and Nat. Mus., Washington city. Obs. This Finch resembles no other species known to us, in such a degree as would render it liable to be confounded with it. It may be easily recognised when adult by its black throat, bordered on each side by a conspicuous white stripe, and having also another equally conspicuous and well-defined stripe over the eye. In the young there is no vestige of the black throat, that part being of a uniform color with the under parts of the body, but bears a strong general resemblance to the adult. It is related to the group designated _Euspiza_ by authors, though it is probably the type of a distinct subdivision. [Illustration: Plate 24 The Black-headed Vireo Vireo atricapillus (_Woodhouse_)] VIREO ATRICAPILLUS.—Woodhouse. The Black-headed Flycatcher. PLATE XXIV.—Adult Male. On account of their modest attire and sylvan habits, the birds of the group to which the present species belongs, are seldom noticed by the general observer, though some of them are to be met with commonly during the summer, in nearly all parts of the United States. But though inconspicuous in appearance, they make ample compensation by the loudness of their notes, which, after the early love-songs of the Thrushes, and other of our songsters of spring, have subsided into the more serious duties of parental responsibility, are to be heard above those of any other of our resident birds. They are active insect-catchers, and may be seen at nearly all hours of the day, patiently searching amongst the leaves and branches of the trees in almost every woodland, hopping from branch to branch, or sometimes making short sallies in pursuit of fugitive moths or butterflies, and occasionally pausing to refresh themselves with a rather quaint but very melodious warble, lengthened in the spring into a cheerful and agreeable song.