264 
TRUDEAU’S TEEN. 
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 blacx band on the side 
of the head as in the adult. 
TRUDEAU’S TERN. 
Sterna Trudeauii. Aud. 
PLATE CCCOXXXV. — 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. 
Trudeau’s Tern, Sterna Trudeauii , Aud. Orn. Biog., vol. v. p. 125. 
Adult, 16; wing, lOff. 
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 
