Bill straight, with the culmen distinct and somewhat ascending into the feathers of the forehead; a few short and weak bristles at the base of the upper mandible, which is rather wide; wing rather long; first quill spurious, third and fourth longest, and nearly equal; tail moderate, wide, truncate; legs long, rather slender. General form adapted to living on the ground. Saxicola œnanthoides. Vigors, Zool. Voy. Blossom, Ornithology, p. 19. (1839.) Form. Rather larger than _Saxicola œnanthe_, but very similar to that species in form and general characters and appearance; wing long; second primary longest; tail moderate or rather short; legs, especially the tarsi, long; bill moderate, rather wide at base. Dimensions. Total length of skin, about 6½ inches; wing, 4⅛; tail, 3; tarsus, 1¼ inches. Colors. Narrow line through the eye, enlarging on the ears, black, which is the color also of the wings; forehead ashy white, fading into the cinerous of the head above; back cinerous; upper coverts of the tail white; under parts white, tinged with pale fulvous, darker on the breast; two middle feathers of the tail white at base; terminal two-thirds of their length black; other feathers of the tail white, tipped with black; bill and legs dark. Hab. Northern America, Nova Scotia, Oregon. Spec. in Mus. Acad., Philadelphia. Obs. We are not without doubts that the bird now before us is really distinct from _Saxicola œnanthe_ of Europe, but having unfortunately a single specimen only, we cannot make an examination or comparison in all respects satisfactory. Our specimen is uniformly larger than either of the numerous specimens of the European species in the collection of the Philadelphia Academy, and is, as an especial character, longer in the tarsi. Its measurements do not, however, correspond with those given in the original description in Voy. Blossom; but it is expressly stated that the specimens described were in bad condition, and may not be entirely reliable. It is, at any rate, very closely allied to the European species that we have just mentioned. With special reference to the present bird, we shall look with much interest for the results of future zoological investigations in the northwestern territories of the United States. There is at the present time no field more inviting to the American naturalist. While much has been done in California, New Mexico, and Texas, the extensive regions which we have above designated have scarcely been entered upon, and will yet contribute much to the fauna of our country. DIOMEDEA NIGRIPES.—Audubon. The Black-footed Albatross. PLATE XXXV. Adult Male.