Yamashina (1938:1) gave the Palau Scops Owl the generic name, _Pyrroglaux_. Mayr (1944b:3) has reviewed this treatment and presents evidence to show that the name _Pyrroglaux_ should not be recognized and that the bird correctly belongs in the genus _Otus_. He presents a detailed discussion to show its relationship to _O. spilocephalus_, and that the characters possessed by _O. podarginus_ are no more different or unusual than those found in other members of this widespread genus. It is pointed out that the reduction of the feathering is probably caused by the change in habitat--from a colder one in Asia to a warmer, tropical one in the Palaus. The bird is probably derived from _O. spilocephalus_ of Asia and Malaysia. =Asio flammeus flammeus= (Pontoppidan) Short-eared Owl _Strix Flammea_ Pontoppidan, Danske, Atlas, 1, 1763, p. 617, pl. 25. (Type locality, Sweden.) _Strix stridula_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, pp. 680, 696 (Mariannes); _idem_, Ann. Sci. Nat. Paris, 6, 1825, p. 149 (Mariannes). _Otus brachyotus_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 18 (Mariannen?). _Asio accipitrinus_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 3 (Marianne); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 168 (Mariannes); Hartert, Novit. Zool., 5, 1898, p. 51 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 44 (Mariannes); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 263 (Tinian); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Tinian); Prowazek, Die deutschen Marianen, 1913, p. 88 (Marianen). _Asi accipitrimus_ Wheeler, Report Island of Guam, 1900, p. 12 (Guam). _Asio flammeus sandwichensis_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 61 (Marianne); Hand-list Japanese Birds (part), rev., 1932, p. 182 (Marianas). _Asio flammeus ponapensis_ Hand-list Japanese Birds (part), 3d ed., 1942, p. 202 (Pagan). _Asio flammeus flammeus_ Mayr, Birds Southwest Pacific, 1945, p. 292 (Marianas). _Geographic range._--Breeds in Europe, Asia, and North America. Winters to tropics. In Micronesia: Mariana Islands--Pagan, Tinian.