_Sula personata_ Gould, Proc. Zool. Soc. London, 1846, p. 21. (Type
locality, North and northeast coasts of Australia = Raine Island.)
_Sula cyanops_ Finsch, Ibis, 1880, p. 219 (Taluit); Wiglesworth,
Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p.
72 (Marshalls); Ogilvie-Grant, Cat. Birds British Mus., 26, 1898,
p. 430 (Marshalls).
_Parasula dactylatra personata_ Kuroda, in Momiyana, Birds
Micronesia, 1922, p. 35 (Marshall Islands); Mathews, Syst. Avium
Australasianarum, 1, 1927, p. 232 (Marshall Islands).
_Sula dactylatra personata_ Yamashina, Tori, 7, 1932, p. 407
(Medinilla); Hand-list Japanese Birds, rev., 1932, p. 187
(Medinilla, Marshall Islands); Hand-list Japanese Birds, 3d ed.,
1942, p. 208 (Medinilla, Marshall Islands).
_Geographic range._--Central and western Pacific from the Hawaiian
Islands south to Australia, probably also in the Indian Ocean. In
Micronesia: Mariana Islands--Medinilla; Marshall Islands--Jaluit?
_Characters._--Adult: A large, white sea bird, with brown wings
and tail; face dark blue; bill horn-colored with base
orange-yellow in males and pink or light red in females; feet
olive in males and lead gray in females.
Immature: Resembles adult, but head, wings, tail, chin and throat
dark brown; some white mottling may be present on back and rump;
bill dark; feet lead colored.
_Nesting._--Yamashina (1932a:407) reports the taking of 12 eggs on
February 19, 1931, at Medinilla Island in the Marianas.
_Remarks._--No specimen has been examined by me from the area reported
upon. Little is known regarding the distribution of the Masked Booby in
Micronesia. It is found on the island groups which surround Micronesia
and future field observations probably will add to our knowledge of its
occurrence in this area. It is known to be resident only in the northern
Marianas.
=Sula sula rubripes= Gould