TIncuba- 
tion, &e. 
General 
descrip- 
tion. 
Summer 
plumage. 
Winter 
plumage. 
Young. 
464 NATATORES. STERNA. TERN. 
laughing. ‘This author has fallen into an essential mistake 
in describing the whole of the upper plumage as of pure 
white ; the mantle and scapulars being, on the contrary, of a 
pale pearl-grey, a colour that prevails on those parts through 
all the members of the Laride.—It breeds upon the lower 
parts of small islands, merely scraping a shallow hole in the 
sand or shingle, and lays two or three eggs of an olive-green 
colour, dashed and spotted with deep brown or black. 
In the adult summer or nuptial plumage, the bill is of a rich 
vermilion, and the legs and feet black. The forehead, 
crown of the head, and lengthened occipital feathers 
velvet-black. Back, scapulars, and wing-coverts pearl- 
grey. Sides of the head, fore part of the neck, and the 
whole of the under plumage pure white. Quills brown, 
tinged with grey. ‘Tail pearl-grey. 
In winter the forehead and crown of the head are white, 
and the occiput is varied with black and white. In 
other respects as above described. 
The young of the year have the upper parts of a pale 
wood-brown, tinged with grey, and varied by the trans- 
verse blackish bars and spots. Quills blackish-brown, 
and the end of the tail of the same colour. The under 
plumage white. 
SANDWICH TERN. 
Sterné Boysu, Lath. 
PLATE LXXXVIII. Fre. 2. 
Sterna Boysii, Lath. Ind. Orn. 2. 806. sp. 10. but not the varieties,— 
A. B.—Flem. Br. Anim. 1. 142. No. 232. 
Sterna cantiaca, Gmel. Syst. 1. 606. sp. 15.—Steph. Shaw’s Zool. 13. 147. 
Hirondelle de Mer Caugek, Temm. Man. d’Orn. 2. 735. 
Sandwich Tern, Lath Syn. 6. 356. 9.—Id. Sup. 266.—Lewin’s Br. Birds, 
6. pl. 203.—Mont. Orn. Dict. and Sup.—Bewick’s Br. Birds, ed. 1826, 
2. p. t. 189.—Shaw’s Zool. 13. 149.—Flem. Br. Anim. 1. 142. No. 132. 
— Rennie’s Mont. Ornith. Dict. 449.—Selby in Zool. Journ, 2. 463. 
