1887.] MR. SCLATER ON NEW SPECIES OF TYRANNIDjE. 4/ 



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 coiniection 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 my fellow-labourers 

 will avail themselves of them, and make full comparisons with tlie 

 figures I have given above of S. antiquus and B. mnrmoratus, 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 Species of Bii'cls of the Family Tyran- 

 nidce. By P. L. Sclater, M.A., Ph.D., F.R.S., 

 Secretary to the Society. 



[Eeceived November 30, 1S80.] 



(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 ciiierea ; f route et siqjerciiiis. curtis albescentibus ; uropygio 

 nigricante ; alls caudague nigricunti-c'mereis ; secundariorum 

 externorum apicibus et rectricis utrinque extimce pogonii externi 

 margine externa ulbicantibus : suhtus pallide cinerea, in ventre et 

 crisso in albidum transiens ; subaluribus albicanti-cinereis ; rostra 

 et pedibus nigris : long, tota 8"3, al(£ 6'0, caudce 3'7, tarsi \'7. 

 Hub. 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 

 TcenioptercB 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 laferibus dilute brunneis ; 

 laris macula albescente notatis ; alis nigris, harum tectricibus 

 dorso concoloribus, primariis et secundariis internis fulvescente, 

 secundariis dorso proximis alba latius Umbatis ; cauda cinerea- 

 nigricante olivaceo limbata, rectricibus omnibus vitta sub- 

 (ipicali nigra, deinde fascia apicali alba prceditis : subtus cine- 

 reus ; gula brunnea, pileo concolore ; plaga cervicali magna 



