TRUDEAU'S TERN. 105 



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 



Vol. VII. 15 



