_Remarks._--The subspecies of _Anoüs tenuirostris_ are well differentiated by color and to a lesser extent by measurements. Table 22 lists measurements which show that the Hawaiian subspecies, _A. t. melanogenys_, has the shortest wing and the shortest tail whereas the subspecies from Cocos and Clipperton islands, _A. t. diamesus_, has the longest wing and the longest tail. The exposed culmen varies in length but little among the four subspecies. The systematic position of _A. t. worcesteri_ from Cavilli Island in the Sula Sea has not been determined because of lack of material. In the third edition of the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:219) the birds from Micronesia are referred to _A. t. worcesteri_ as they are also in other recent publications by the Japanese. Specimens from the Philippines are needed for examination to determine satisfactorily the subspecies status of the birds under consideration. Field observations indicate that the White-capped Noddy is not abundant in the Mariana Islands. According to Oustalet (1896:60), Marche obtained a female at Saipan in June, 1888, and Yamashina (1940:678) records five adults from Assongsong (Asuncion). Owston's collectors obtained a specimen at Asuncion on January 18, 1904. In the Palaus, Carolines, and Marshalls birds of this species are numerous and have been observed or collected at many of the islands. Coultas with the Whitney South Sea Expedition obtained specimens at Kusaie, Ponapé and Palau. He found them along the shores of the large islands and, especially, on the smaller offshore islets. At Ulithi Atoll in August, 1945, the NAMRU2 party observed small flocks of four to ten individuals flying offshore and feeding inside the reef. They were frequently observed in company with _Sterna sumatrana_. Fewer birds were seen in September, 1945, at the Palau Islands by the NAMRU2 party. =Gygis alba candida= (Gmelin) White Tern _Sterna candida_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 607. (Type locality, Christmas Island.) _Gygis candida_ Finsch, Ibis, 1880, p. 220 (Taluit); Saunders (part), Cat. Birds British Mus., 25, 1896, p. 149 (Marshalls); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln). _Gygis alba_ Finsch, Ibis, 1880, pp. 330, 332 (Taluit); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 78 (Marshalls); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 58 (Saypan, Pagan, Agrigan, Marshalls); Safford, Guam, 1912, p. 19 (Guam); Strophlet, Auk, 63, 1946, p. 537 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam); Stott, Auk, 64, 1947, p. 525 (Saipan); Baker (part), Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 57 (Guam, Rota, Saipan).