1887.] MR. SCLATER ON NEW SPECIES OF TYRANNIDiE. 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 pubHcation. 



When good opportunities occur in the future to examine the 

 visceral organization of any of the Auks, I trust my fcdlow-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 my work in the present paper. 



We stand sadly in need of series of alcoholic specimens of Arctic 

 water-fowl in the vast majority of our museums. 



5. Characters of new Siiecies of Birds of the Family Tyran- 

 nidEe. By P. L. Sclateb, M.A., Ph.D., F.R.S., 

 Secretary to the Society. 



[Eeceived November 30, 1SS6.] 



(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 immber 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. UOV. 



Supra cinerea ; fronte et superciliis. curtis albesceiUibus ; uropygio 

 nigricante ; alls caudaque nigricanti-cinereis ; secundariorum 

 ejcternorum apicibus et rectricis utringue extimce jjoffonii externi 

 margine externo albicantibus : suhius pallide cinerea, in ventre et 

 crisso in albidum transiens ; subalaribus albicanti-ciaereis ; rosti-o 

 et pedibus nigris : long, iota 8'3, alee 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 

 TcBniopter(B by its uniform style of coloration, large size, and long 

 wings. The specimens are both in moult. 



2. EusCARTHMUs APiCALis, sp. UOV. (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- 

 nigricante olivaceo Umbata, rectricibus omnibus vitta sub- 

 apicali nigra, deinde fascia apicali alba praditis : subtus cine- 

 reus ; gala brunnea, pileo concolore ; plaga cervicali magna 



