Vol. 33, pp. 83-84 December 30, 1920 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON MUTANDA ORNITHOLOGICA. IX. BY HARRY C. OBERHOLSER. Further notes 1 on untenable names of birds are furnished below. These refer to species in the families Corvidae, Mota-cillidae, Sylviidae, Turdoididae, and Timaliidae. Family CORVIDAE. Dendrocitta sinensis (Latham). The name Dendrocitta sinensis for a Chinese jay must now be changed, since its basis, Corvus sinensis Latham (Index Ornith., I, 1790, p. 161; Macao Island, China), is found to be preoccupied by Corvus sinensis Gmelin (Syst. Nat., I, i, 1788, p. 372; China) for another and unidentified species. Since no other name is available for Dendrocitta sinensis, we propose to call it Dendrocitta celadina, nom. nov. Family MOTACILLIDAE. Motacilla longicauda Riippell. The name Motacilla longicauda Riippell (Neue Wirb. Faun. Abyss., Vog., 1835, p. 84, pi. XIX, fig. 2; Province of Simen, Abyssinia), for a well known African wagtail, is untenable on account of the previous Motacilla longicauda Gmelin (Syst. Nat., I, ii, 1789, p. 954, China), a synonym of Sutoria sutoria (Forster). Its only synonym, Motacilla longicaudata Grant and Reid (Ibis, ser. 8, I, No. IV, October, 1901, p. 630; nom. emend, pro Motacilla longicauda Riippell), is preoccupied by Motacilla longicau-data Hermann (Observ. Zool., 1804, p. 210; no locality). A new specific designation is therefore necessary for Motacilla longicauda Riippell, and we provide it in Motacilla rhadinura, nom. nov. 1 For the eight previous articles in this series, cf. Proc. Biol. Soc. Wash., 30, March 31, 1917, pp. 75-76; July 27, 1917, pp. 125-126; ibid., 31, May 16, 1918, pp. 47-49; November 29, 1918, pp. 125-126; ibid., 32, February 14, 1919, pp. 7-8; April 11, 1919, pp. 21-22; June 27, 1919, pp. 127-128; December 31, 1919, pp. 239-240. 16 — Proc. Biol. Soc. Wash., Vol. 33, 1920. (83)