The colouring of the upper parts is almost the same, but the Savannah Finch has very little of the bright bay tints, and the flexure of the wing is so slightly tinged with yellow that one might be apt to overlook it. There is a central whitish streak on the head of the Savannah Finch, as on that of the Yellow-winged Sparrow. The great difference in colouring lies in the circumstance, that while the throat, breast, and sides of the latter are unspotted, those of the former are very conspicuously marked with longitudinal dark brown streaks, margined with reddish-brown.
The bills and feet are of the same form, but the bill of the Savannah Finch is much less robust, and its feet rather more so. In the Savannah Finch the secondaries are proportionally as long as in the Henslow Bunting, and the third and fourth quills are longest; whereas in the Yellow-winged Sparrow the first is longest, and in the Henslow Bunting the third.
Having in my possession a fine specimen of a new species allied to the above, but still more decidedly an Emberiza, I embrace this opportunity of describing it. The species having been discovered, in the vicinity of Philadelphia, by Dr Townsend of that city, I cannot dedicate it with equal propriety to any other individual, and I am happy in thus paying my tribute of respect to him for his great attainments in ornithology.
TOWNSEND'S BUNTING.
Emberiza Townsendii.
In form this species is compact and rather robust, like the common Sparrow of Europe, or the Black-throated Bunting of America. The bill is short, strong, conical, compressed, acute; the upper mandible narrower, with its dorsal line a little convex, as is that of the lower, the edges of both inflected, and the gap-line declinate at the base. Nostrils roundish, basal. Feet of ordinary length and thickness, the tarsus with seven anterior scutella, and two lateral plates meeting behind so as to form an edge; lateral toes equal, the outer united as far as the second joint, hind-toe strong; claws, arched, compressed, acute, with a lateral groove.
The wings are short, the first quill longest, the next scarcely shorter, the rest graduated, the second, third, and fourth, very slightly cut out on the outer web towards the end, the secondaries rounded, the outer slightly emarginate. Tail of moderate length, and slightly emarginate. The plumage is soft and rather compact.
Bill brownish-black above, light blue beneath, with a longitudinal black line from the tip half way to the base. Iris light hazel. Feet and claws dusky brown. Head above deep bluish-grey, streaked with black; the cheeks, hind-neck, sides of the neck, fore part of the breast, and the sides of the same colour, becoming paler backwards. Back bluish-grey, each feather with a narrow dark brown central streak bordered with light brown, the margins grey; the rump grey, without streaks. Quills and tail wood-brown, slightly edged with paler, wing-coverts light brown, the central parts of the feathers darker. There is a narrow white line over the eye, and the minute feathers margining the eyelids are of the same colour. The throat and fore-neck are white. A line of short brownish-black streaks passes on either side from the base of the lower mandible, separating a narrow portion of the white space, and margining the lower part of it, although there the streaks are scattered; the middle part of the breast and abdomen are also greyish-white.
Length 5¾ inches, extent of wings 9; bill along the ridge 7⁄12; tarsus 10⁄12.