is coloured as above; but the other is a young bird, which may here be
described.
The bill is somewhat shorter and more tinged with brown; the lower parts, the rump, the outer web of the lateral tail-feathers and the sides of the neck are white; the wings as in the adult, but the primaries internally margined with white, and the secondaries tipped with the same; the upper part of the head, and the rest of the upper parts, are light yellowish-brown, intermixed with greyish-blue, and there is the same black band on the side of the head as in the adult.
TRUDEAU'S TERN.
Sterna Trudeauii, Jlud.
PLATE CCCCXXXV.— Adult.
This beautiful Tern, which has not hitherto been described, was procured at Great Egg Harbour in New Jersey, by my much esteemed and talented friend, J. Trudeau, Esq. of Louisiana, to whom I have great pleasure in dedicating it. Nothing is known as to its range, or even the particular habits in which it may differ from other species. The individual obtained was in the company of a few others of the same kind. I have received from Mr. Trudeau an intimation of the occurrence of several individuals on Long Island.
Trcdeau's Tern, Sterna Trudeaui, Aud. Orn. Biog., vol. v. p. 125. Adult, 16; wing, l()if.
Great Egg Harbour and Long Island. Rare. Migratory. Adult in winter plumage.
Bill about the length of the head, rather slender, much compressed, acumi- nate. Upper mandible with the dorsal line slightly declinato-convex, the ridge rather broad and convex at the base, very narrow in the rest of its extent, the sides sloping at the base, nearly erect and convex toward the end, the edges sharp and inflected, the tip very narrow. Nasal groove rather short, but with a slight channel, surmounted by a ridge, running from its
