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Show 1885.] DURING THE VOYAGE OF THE YACHT ' MARCHESA.' 269 48. PTILOPUS MELANOCEPHALUS, Forster. Ptilopus melanocephalus, Wald. P. Z. S. 1878, p. 951 ; id. ident. 1879, p. 73. Hab. Mindanao (Everett) ; Basilan (Everett) ; Sulu (Guillemard) Celebes (Guillemard). a, b. 6*. Sulu Island. Iris yellow; bill greenish; tarsus coral. Length 22*5 centims., wing 1 1*8 centims. These Sulu examples do not differ from Cele-bean skins (P. me/anospilus of Salvadori), excepting in having the yellow gular patch slightly paler and broader. 49. PTILOPUS FORMOSUS (G. R. Gray). Lamprotreron formosa, G. R. Gray, P. Z. S. 1860, p. 360; Wallace, Ibis, 1865, p. 379 ; Walden, Tr. Z. S. viii. p. 82. Hab. Celebes (Wallace) ; Sulu (Guillemard). a. <S • Sulu Island. Iris sea-green ; bill green, reddish at base ; tarsus greenish olive. Length 29*5 centims.; wing 14*4 centims.. P. formosus of Gray can be at once recognized as distinct from the Moluccan and Papuan P. superbus, (1) by the strong violet tinge of the upper breast, which merges into the dark pectoral band, and, (2) by the violet of the head being conterminous with the ruddy orange of the cervix, there being no intervening greenish band. The present Sulu example shows both these distinctions, but appears to be of somewhat larger size, and is characterized by the absence of the maillee appearance of the breast, due to the small number of feathers that are bifid. The following are the comparative admeasurements in centimetres :- Length. Wing. P. formosus, Celebes (Wallace) 26*5 12*6 „ „ (Guillemard) .... 250 13*2 Sulu (Guillemard) 29*5 13-4 50. PHABOTRERON BREVIROSTRIS, Tweeddale. Phabotreron brevirostris, Tweedd. P. Z. S. 1877, pp. 549, 832 id. ident. 1878, pp. 113, 344, 952 ; id. ident. 1879, p. 73. Hab. Leyte, Dinagat, Mindanao, and Basilan (Everett); Sulu (Guillemard). a. 2 • Sulu Island. Iris, outer ring red, inner white ; bill brownish; tarsus dull coral-red. Length 23*0 centims., wing 11*6 centims., bill from forehead 1*5 centims., tail 9*0 centims. This example agrees with Lord Tweeddale's description of P. brevirostris, excepting that the back and upper tail-coverts are dull metallic olive. In the type (from Mindanao) the back is " mixed amethystine and dull yellow-green; uropygium and upper tail-coverts dull yellow-green with scarcely any iridescence." The Sulu bird corresponds, however, in having the rufo-fulvous forehead, the |