_Motacilla Calliope_ Pallas, Reise durch versch. Prov. russ. Reichs, 3, 1776, pp. 261, 325, 697. (Type locality, Yenesei.) _Luscinia calliope calliope_ Hand-list Japanese Birds, rev., 1932, p. 178 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Siberian Rubythroat is considered to be a casual winter visitor to the Palau Islands. =Monticola solitaria philippensis= (Müller) Chinese Blue Rock Thrush _Turdus philippensis_ Müller, Natursystem Supplements- und Register-Band, 1776, p. 145. (Type locality, Philippine Islands, _ex_ Buffon.) _Monticola philippensis philippensis_ Hand-list Japanese Birds, rev., 1932, p. 177 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Monticola solitarius philippensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror). _Geographic range._--Breeds in northeastern Asia and Japan. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Chinese Blue Rock Thrush is apparently an infrequent winter visitor to the Palau Islands. =Turdus obscurus obscurus= Gmelin Dusky Thrush _Turdus obscuras_ Gmelin, Syst. Nat., 1, 1789, p. 816. (Type locality, Lake Baikal.) _Turdus obscuras_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 96 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 22 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 66 (Pelew). _Merula obscura_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 39 (Pelew). _Turdus obscuras obscuras_ Hand-list Japanese Birds, rev., 1932, p. 177 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Dusky Thrush is considered to be a casual winter visitor to the Palau Islands. It was first taken there by Captain Heinsohn, according to Hartlaub and Finsch (1872:96). =Psamathia annae= Hartlaub and Finsch Palau Bush-warbler _Psamathia annae_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 5, pl. 2. (Type locality, Pelew Islands.)