“Head scarlet; back grey; belly white; bill and feet black. A fine and rare Swallow, seen only once by Mr. Audubon, near Hendersonville, in Kentucky; it must have been a wanderer, and is probably a native of Louisiana or Mexico.” “Head scarlet”—enough said; Professor Rafinesque brings our ornithological ideas to a stand immediately. We never heard of a Swallow with the head of that color, exactly. But as Mr. Audubon’s name is brought in as authority, we think it possible that the bird alluded to in this description may have been a straggling specimen of a South American species, which has the head of a rufous color (_Cortyle fucata_, Temm., Pl. Col. 161, fig. 1). Rafinesque apparently gave his description and name without ever having seen the bird, or made further inquiry, and probably misunderstood or partly forgot the statement of Mr. Audubon respecting the color of the head. Several instances of South American birds having been captured in the United States have come to our knowledge. We ought to have said, though, previously, that many more South American birds inhabit Mexico than are recorded in the books. Several specimens of _Crotophaga sulcirostra_ have come under our notice, the last one of which was shot on an island in the Delaware, opposite to the northern portion of this city. Its plumage was perfectly mature and uninjured, showing evidently that it had never been caged. 3. Acanthylis saxatilis. Woodhouse, Sitgreave’s Report of an Expedition down the Zuni and Colorado Rivers, Zoology, p. 64 (Washington, 1853). “Head and rump white; back, tail, wings, and side, black; beneath white; upper tail-coverts black; under tail-coverts white. About the size of _A. pelasgia_, and in its mode of flight the same.” “This beautiful Swift I saw whilst encamped at Inscription Rock, New Mexico. Being on the top of this high rock at the time without my gun, I was unable to procure specimens. I had a fair view of the birds at this time, as they flew close to me. I descended immediately and procured my gun, but the birds by this time flew too high for me to be able to procure a shot at them. They were breeding in the crevices of the rocks. I was still in hopes of seeing them again along our route, but I had not that pleasure, it being the only place that I have observed them.” This bird has not been noticed since the publication of the above description by Dr. Woodhouse. 4. Hirundo cinerea. “The Ash-bellied Swallow.” Ord, in Guthrie’s Geography, II. p. 317. (1815.) This name occurs, without a description, in Mr. Ord’s Catalogue of the Birds of North America, in Guthrie’s Geography, as above.