266 AVES NATATORES. [STERNA. 



S. Dougalli, Temm. Man. d'Orn. torn. n. p. 738. Roseate Tern, 

 Mont. Orn. Diet. Supp. with fig. Bew. Brit. Birds, vol. 11. p. 192. 

 Selb. Illust. vol. ii. p. 470. pi. 89. f. 1, & 2. 



DIMENS. Entire length fifteen inches six lines : length of the bill 

 (from the forehead) one inch seven lines and a half; of the tarsus nine 

 lines ; of the tail seven inches ; from the carpus to the end of the wing 

 nine inches three lines. 



DESCRIPT. (Summer plumage.) Forehead, crown, and long occipital 

 feathers, deep black; cheeks, throat, neck, and all the under parts, pure 

 white, tinged on the fore part of the neck, breast, and belly, with rose- 

 red : back, scapulars, and wing-coverts, pale ash-gray : first quill with 

 the outer web hoary black ; the rest gray : all of them with a deep 

 border of white on their inner webs : tail white, greatly forked ; the outer 

 feathers very long and subulate, extending upwards of two inches 

 beyond the wings : bill long and slender, black, passing into orange-red 

 at the base : legs bright orange : claws small and black. (Young.) " Bill 

 brownish black; the base orange-yellow: forehead and crown cream- 

 yellow, tinged with gray : region of the eyes, ear-coverts, and nape, 

 grayish black, mixed with yellowish white: throat, sides of the neck, 

 and under parts, white : ridge of the wings blackish gray, margined 

 paler : back and wing-coverts bluish gray, marbled with grayish -black 

 and yellowish white: tail-feathers with the exterior webs gray, the 

 interior and tips white : quills gray, margined with white : legs pale 

 gallstone-yellow." SELB. (Egg.) Yellowish stone-colour; spotted and 

 speckled with ash-gray and dark brown : long. diam. one inch nine lines 

 and a half; trans, diam. one inch two lines and a half. 



First noticed on the Cumbrey Islands in the Frith of Clyde, by 

 Dr Macdougall, who communicated the species to Montagu. Since ob- 

 served on other parts of the Scotch coast, and also in the Fern Islands, to 

 which last locality, according to Selby, they resort annually to breed. 

 Eggs two or three in number. Food, small fish. 



284. S. Hirundo, Linn. (Common Tern.) Bill 

 moderate ; red, the tip black : legs red : tarsus nine lines 

 and a half: tail very much forked ; as long as, or a little 

 shorter than, the wings. 



S. Hirundo, Temm. Man. d'Orn. torn. n. p. 740. Common Tern, 

 Mont. Orn. Diet, fy Supp. Bew. Brit. Birds, vol. n. p. 185. 

 Selb. Illust. vol. n. p. 468. pi. 90. f. 1. 



DIMENS. Entire length thirteen inches six lines : length of the bill 

 (from the forehead) one inch seven lines and a half, (from the gape) two 

 inches two lines; of the tarsus nine lines and a half; of the tail four 

 inches six lines ; from the carpus to the end of the wing ten inches four 

 lines : breadth, wings extended, two feet six inches eight lines. 



DESCRIPT. (Summer plumage.) Forehead, crown, and long occipital 

 feathers, deep black ; hind part of the neck, back, scapulars, and wing- 

 coverts, bluish ash : all the under parts white, the breast and belly faintly 

 tinged with ash-colour : quills ash-gray passing into dusky brown at the 

 tips, with a large oblong white space on their inner webs : tail whitish ; 

 the outer webs of the two exterior feathers dusky ash : bill red, passing 

 into dusky at the tip: feet bright red. The winter plumage differs 

 simply in having the forehead and crown of a more dull black. (Young 

 of the year.) Forehead and anterior part of the crown dirty white; rest 



