_Megapodius lapérouse senex_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 14 (Pelew); Takastukasa, Birds Nippon, vol. 1, pt. 1, 1932, p. 13, pl. 4, 5 (Pelew); Yamashina, Tori, 7, 1932, p. 412 (Ngesebus, Auror, Peliliu); Hand-list Japanese Birds, rev., 1932, p. 198 (Palau); Peters, Check-list Birds World, 2, 1934, p. 6 (Palau); Yamashina, Tori, 10, 1940, p. 679 (Gayangas, Arumidin); Amadon, Amer. Mus. Novit., no. 1175, 1942, p. 9 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 286 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 46 (Garakayo, Peleliu, Ngabad). _Megapodius la pérouse senex_ Hand-list Japanese Birds, 3d ed., 1942, p. 223 (Babelthuap, Koror, Auror, Ngesebus, Peliliu, Gayangas, Arumidin). _Megapodius laperouse_ Wharton and Hardcastle, Journ. Parasitology, 32, 1946, p. 294 (Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Auror, Kayangel, Garakayo, Ngesebus, Peleliu, Ngabad, Gayangas, Arumidin. _Characters._--Adult: A small megapode with top of head near "mouse gray"; forehead, sides of face and neck, chin, and throat thinly covered with feathers of the same color; mantle and upper breast grayish-black becoming dark olive-brown on wings; lower back, rump and upper tail-coverts dark brown; tail blackish-brown; underparts grayish-brown, lighter on midline of belly; under wings dark brown; exposed skin of head reddish to yellowish-red; bill yellowish, basally blackish; legs yellowish; feet and claws black; iris tan. _Measurements._--Measurements of three adult males: wing, 178, 182, 188; tail, 55, 63; culmen, 22.7, 23.3; tarsus, 55, 56, 57; of seven adult females: wing, 171-189 (182); tail, 46-68 (58); culmen, 25-30 (27); tarsus, 45-60 (55). Takatsukasa (1932:14) lists the following measurements: males--wing, 176-181; tail, 59-67; culmen, 25.5-26.0; tarsus, 58-61; females--wing, 177-187; tail, 62-68; culmen, 24.0-26.0; tarsus, 55-58. _Specimens examined._--Total number, 23 (11 males, 8 females, 4 unsexed), as follows: Palau Islands, USNM--Koror, 1 (Nov. 28)--Garakayo, 5 (Sept. 17, 18, 19)--Peleliu, 2 (Aug. 31, Sept. 1)--Ngabad, 1 (Sept. 11); AMNH--Palau, 16 (Nov., Dec., not dated). _Nesting._--The megapodes do not incubate their eggs, but the female deposits them in a moundlike structure of sand, volcanic ash, and forest litter or some other type of soil in which there is warmth sufficient to hatch the eggs after an extended period (perhaps 40 days or more) without further attention from the parent bird. The young dig out and lead an independent existence. Several megapodes may utilize one nest site, which ordinarily is at a low elevation near a beach or lagoon.