Sterna maxima, Scl. et Salv. Nomencl. p. 147; iid. P. Z. S. 1871, p. 567; Saunders, P. Z. S. 1876, p. 655, et 1882, p. 521.
Description.—Crown and crested nape black; neck, lores, throat, and underparts pure white; black pale grey; quills darker grey, with white on most of the inner webs; tail pearl-white; bill orange; legs and feet black: whole length 18·0 inches, wing 14·5. Young: darker on upper parts.
Head of Sterna maxima.
(P. Z. S. 1871, p. 568.)
Hab. Coasts of America from Massachusetts to La Plata, and northwards to California.
This large Tern seems to occur on the Rio Paraná, according to Azara. It is certainly found in Southern Brazil, where Mr. Rogers obtained a series of specimens now in the collections of Messrs. Salvin and Godman and of Mr. H. Saunders.
[413.] STERNA TRUDEAUII, Aud.
(TRUDEAU’S TERN.)
Sterna trudeauii, Scl. et Salv. Nomencl. p. 147, iid. P. Z. S. 1871, p. 570; Durnford, Ibis, 1877, p. 200 (Buenos Ayres); Saunders, P. Z. S. 1876, p. 660. Sterna frobeenii, Phil. et Landb. Wiegm. Arch. 1863, pt. i. p. 125 (Chili).
Description.—Above light grey; head white, with a dark transocular line on each side; rump white: beneath light grey; bill black, base and tip yellow; feet yellow: whole length 12·5 inches, wing 10·0. The young are pure white below, and have darker quills.