Philippine records of this species are usually recorded under Sterna bergii, but the specimens probably belong to the variety S. bergii boreotis. The question can not be cleared up at present. 81. STERNA ANÆSTHETA Scopoli. PANAYAN TERN. Sterna anæstheta Scopoli, Del. Flor. et Faun. Insubr. (1786), 1, 92; Saunders, Cat. Birds Brit. Mus. (1896), 25, 101; Sharpe, Hand-List (1899), 1, 136; Oates, Cat. Birds' Eggs (1901), 1, 190; McGregor and Worcester, Hand-List (1906), 20. Worcester, Phil. Jour. Sci. (1907), 2, sec. A, 275, pl. 1 (nesting place). Didicas Rocks (Worcester); Panay (Sonnerat). African and Indian seas to China, Japan, Moluccas, northern Australian, Pacific Islands; Gulf of Mexico, Western Indies. "Adult in breeding plumage.--Loral stripe black; upper forehead, crown, and nape black; shoulders slate-gray, passing into dark grayish brown on mantle; no visible white on secondaries; primaries umber-brown, shafts black, the 'wedges' on inner webs very narrow and not sharply defined; rump and principal tail-feathers grayish brown like the mantle, but the streamers white on outer and upper portions of inner webs, and the next pair of rectrices whitish at their bases; abdomen and breast grayish white; under wing-coverts and throat pure white. Bill, tarsi, and toes black, the inner webs of the latter considerably excised. Length, 355 to 380; culmen, 45; wing, 262; tail, 190; depth of fork, 102; tarsus, 20; middle toe with claw, 30. The sexes are alike in plumage. "Adult in winter plumage.--Similar to the above, but the lores and crown mottled with white for a short time. "Immature.--Generally similar, but with more white on the head; whitish tips to the feathers of the back, which, when fresh, are somewhat gray; a dark line along upper wing-coverts, and less white on outer rectrices. Full plumage is not attained until the bird is at least two years old. "Young.--Head streaked and mottled with brownish black; feathers of upper parts dark brown with rufous tips, which subsequently become paler, approaching white, and finally wear away; under parts grayish white. Bill and toes brownish." (Saunders.) 82. STERNA FUSCATA Linnæus. SOOTY TERN. Sterna fuscata Linnæus, Syst. Nat. ed. 12 (1766), 1, 228. [12] Sterna fuliginosa Saunders, Cat. Birds Brit. Mus. (1896), 25, 106; Sharpe, Hand-List (1899), 1, 136; Oates, Cat. Birds' Eggs (1901), 1, 191; McGregor and Worcester, Hand-List (1906), 21. Siquijor (Bourns & Worcester). Tropical and juxtatropical seas of the world.