Larger than either of the two preceding species; wing long; second quill longest; tail rather long; emarginate; legs and feet short; tarsus feathered in front slightly below the joint with the tibia; bare part of the tarsus and the toes with very distinct scales; entire upper parts variegated with dark brown and pale reddish fulvous, every feather being tipped and spotted with the latter, which predominates on the back, rump, wing-coverts, and tertiaries; some spots on the tertiaries rufous; breast dark brown, every feather tipped with dull reddish fulvous; abdomen white, tinged with pale reddish-yellow, every feather with transverse stripes of brownish-black; under-coverts dull reddish white, with transverse lines of brownish-black; neck with a large band of white in front; quills brownish-black, tipped with dull reddish-white; primaries with a wide transverse band of white at about half their length; tail with alternate irregular stripes of brownish-black and pale reddish fulvous, the latter mottled with black; under wing-coverts pale reddish-white, with bands and spots of brownish-black. Female. Colors paler, and white of the neck obscure. Dimensions. Total length of skin, about 10 inches; wing, 8; tail, 4½ inches. Hab. New Mexico (Dr. Henry, Lieut. Gunnison). Spec. in Nat. Mus., Washington, and Mus. Acad., Philada. Obs. This bird may be distinguished from other American species by its color, which is lighter and of a different style of variegation, the prevailing tone being a dull, pale reddish and yellowish, somewhat approaching what is called buff or drab color. It is larger than _Chordeiles virginianus_. Specimens of this interesting species have been procured at Fort Webster, New Mexico, by Dr. Henry, and by the unfortunate party under command of the late Lieut. Gunnison. As a token of respect for T. Charlton Henry, M. D., of the United States Army, whose exertions in the investigation of the natural productions of New Mexico, now continued for several years, and the formation of large collections in various departments, which attest his zeal and attachment to zoological science, we propose the specific name above given. B. OBSCURE OR LITTLE KNOWN SPECIES OF THIS FAMILY. 1. Caprimulgus macromystax. Wagler, Isis, XXIV. p. 533. (1831.) This species is noticed by Wagler, as above, from a Mexican specimen, and his description is essentially a comparison with the _Caprimulgus europæus_. It is stated that the bristles at the base of the bill are very long, or “nearly as long as the head without the bill,” and the plumage generally bearing a resemblance to the European species mentioned.