Vol. xlii.] 74 



The genus Pterodurus was established (Comptes Rend, 

 xlii. p. 880, 1856) bj Bonaparte for the long-tailed species 

 jP. alchata, exustus, namaqua^ and senegallus, and the type 

 designated by O.-Grant himself as the first-named. It is 

 therefore obvious that the generic names Pterodes and 

 Pterodurus are synonyms, and that Pterodes must be used 

 for the Long-tailed Sandgrouse. 



If following Dr. Hartert (Vog. pal. Faun. p. 1501) we 

 consider the elongation of the central tail-feathers not of 

 sufficient importance to justify generic separation, we can 

 keep all the species (except, of course, Syrrhapes paradoxus) 

 under the generic name Pterodes as he has done. If not, 

 we must find a new substitute name for the short-tailed 

 species. I would propose, therefore, for this purpose 



Eremialector, nom. nov., 



to take the place of Pterodes O.-Grant nee G. Gray, and 

 designate as the type Tetrao orientalis Linn., which is an 

 older name for the better known Pterodes arenarius (Pall.). 

 The name derives from iprj/xia, a desert, and aXeKTCop, a cock. 



Pterocles variegatus. 



It has been pointed out to me by Mr. T. Iredale that the 

 name Tetrao variegatus Burchell ('Travels,' ii. p. 345, 1824) 

 is preoccupied by Tetrao variegatus Gmelin (Syst. Nat. i. 

 pt. 2, p. 768, 1789), bestowed on the Variegated Tinamou of 

 Latham, and now known as Crypturus variegatus. As there 

 appears to be no synonym for this distinct species of Sand- 

 grouse, I propose to rename it after the discoverer 



Pterocles [Eremialector] burchelli, nom. nov. 



Genus Spizaetus. 



This genus is a somewhat comprehensive one, containing 

 as it does, according to Sharpe and most authors, very 

 different-looking Accipitrine birds from South America, 

 Africa, and south-eastern Asia. Its distinguishing character, 

 according to Sharpe, is the short and rounded wing, in which 



