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Show 1887.] MR. SCLATER ON NEW SPECIES OF TYRANNID.E. 47 constant for the lower larynx, the heart, the spleen, and especially the livers of these two forms, they certainly constitute very excellent generic characters, especially when taken in connection with the additional ones found to exist in the skeletons. These latter I have elsewhere dealt with, but the work at present is in the hands of the Smithsonian Institution for publication. When good opportunities occur in the future to examine the visceral organization of any of the Auks, I trust m y fellow-labourers will avail themselves of them, and make full comparisons with the figures I have given above of S. antiquus and B. marmoratus, as well as test the correctness of m y work in the present paper. W e stand sadly in need of series of alcoholic specimens of Arctic water-fowl in the vast majority of our museums. 5. Characters of new Species of Birds of the Family Tyran-nidae. By P. L. S C L A T E R , M.A., Ph.D., F.R.S., Secretary to the Society. [Received November 30, 1886.] (Plate IX.) During the work which I am now engaged upon of preparing the Catalogue of the specimens of the birds of the family Tyrannidse in the British Museum, I have met with a certain number of examples of this difficult group which are not, so far as I can make out, referable to described species. Of these, I beg leave to submit the following characters to the Society. 1. T_£NIOPTERA HOLOSPODIA, sp. nov. Supra cinerea ; fronte et superciliis curtis albescentibus ; uropygio nigricante; alis caudaque nigricanti-cinereis ; secundariorum externorum apicibus et rectricis utrinque extimce pogonii externi margine externo albicantibus : subtus pallide cinerea, in ventre et crisso in albidum transiens; subalaribus albicanti-cinereis; rostro et pedibus nigris : long, tola 8'3, ala? 6'0, caudce 3'7, tarsi 1*7. Hab. Bolivia (Bridges). Mus. Brit. This species, established on two skins, obtained by T. Bridges in Bolivia, in the National Collection, is distinguished from the other Tceniopterce by its uniform style of coloration, large size, and long wings. The specimens are both in moult. 2. EUSCARTHMUS APICALIS, sp. nov. (Plate IX. fig. 1.) Supra olivaceus; pileo toto cum capitis lateribus dilute brunneis ; loris macula albescente notatis; alis nigris, harum tectricibus dorso concoloribus, primariis et secundariis internis fulvescente, secundariis dorso proximis albo latius limbatis; cauda cinereo-niaricante olivuceo limbata, rectricibus omnibus vitta sub-apicali nigra, deinde fascia apicali alba prceditis: subtus cinereus ; gala brunnea, pileo concolore; plaga cervicali magna |