Hab. All of temperate North America, New Mexico (McCall); Oregon (Townsend); California (Heermann); Canada (Hall); Mexico (Rivoli collection); Nicaragua (Barruel); Cuba (Lembeye); Jamaica (Gosse). Spec. in Mus. Acad., Philada. Obs. An abundant species everywhere in the United States. 2. Chordeiles sapiti. Bonaparte, Cons. Av., p. 63. (1849.) Not figured. Very similar in form and general appearance to the preceding, but smaller, and with all the colors paler; bill very short and weak; gape large; wing long; first quill slightly longest; tail moderate, emarginate; tarsus feathered in front somewhat below the point with the tibia; throat white; entire upper plumage brownish-black, mottled, and variegated, with very pale cinereous, which predominates on the back, rump, and coverts of the wings; under-parts with transverse narrow bands of dark brown and yellowish-white; quills brownish-black, with a wide transverse band of white at the distance from their end of about one-third their length, and also with some irregular spots and pairs of spots of rufous in their basal halves. Female paler, and with the white of the throat tinged with pale reddish fulvous. Dimensions. Total length, about 8½ inches; wing, 7¼; tail, 4½ inches. Hab. Texas (Mr. Clark, Capt. McCown); New Mexico, Central America. Spec. in Mus. Acad., Philada., and Nat. Mus., Washington. Obs. This species is nearly allied to the preceding, and also to _Chordeiles brasilianus_, from both of which it differs in some particulars of form, and also in having its colors much paler. In the latter character it somewhat resembles the _C. acutipennis_ of South America. We regard this bird provisionally under the name above given, but the description as cited is too brief to be satisfactory. It is, however, the only species known to us that can be referred to it. This bird is abundant in Texas during the summer. 3. Chordeiles Henryi. _nobis_ (new species, January, 1855). Not figured.