6 BKITISH BIRDS. [vol. ix. 



differences, though obvious, are merely degrees of coloration 

 and therefore the two forms must be considered as sub- 

 species. F. columbariiis L. 1758 being the oldest name, 

 our British form must be called as above. 



241. Aquila clanga Pall. 



Aquila Clanga Pallas, Zoogr. Rosso-Asiat., I., p. 351 flS27 — 

 Russia). 



instead of Aquila maculaia (Gm.). It has been shown 

 {B.O.U. List, p. 379) that Falco maculatus Gmelin 1788 is 

 antedated by Falco maculatus Tunstall 1771 which ==Per;t?'.s- 

 apivorus. Therefore the next oldest name Aquila fusca 

 Brehm 1823 is used in the B.O.U. List. But Mr. T. Iredale 

 has shown {Ibis, 1915, p. 388) that this name must also be 

 discarded because of its prior use by Dumont {Diet. Sci. Nat., 

 I., p. 344, 1804) for a bird which appears to be a Golden 

 Eagle. We must therefore fall back uyton the next oldest 

 available name Aquila clanga of Pallas. 



251. Milvus migrans migrans (Boddaert) 



Falco migrans Boddaert, Tables Planches Encl., No. 472, 

 p. 28 (1783 — Based on Daubenton's pi. 472, several countries 

 of Europe mentioned, tj^^ical locality : France (Hartcrt 1914)). 



instead of 31. k. korschun (Gm.) which must be abandoned 

 as the description of Accipiter korschun S. G. Gmelin does 

 not agree with that of any Milvus, in fact it appears to refer 

 to a young Circus oeruginosus, with the description of which 

 the author seems to have mixed his notes referring to a Milnis. 



259. Plegadis falcinellus falcinellus (L.) 



instead of Egatheus f. falcinellus (L.). Dr. C. W. Richmond 

 and Mr. G. M. Mathews have shoA\Ti {Auk, 1913, pp. 92-5) that 

 Egatheus Bill berg 1828 was inidoubtedly introduced merely 

 as a substitute for Ibis Lacepede. Plegadis Kaup 1829 

 must therefore be used as the generic name of the Glossy Ibis. 



269. Botaurus lentiginosus (Mont.). 



instead of B. stcllaris lentiginosus. This liittern is so widely 

 different from B. stellaris that it should be looked upon as a 

 species. The reference to allied subspecies under No. 268 

 must be altered accordingly. 



270. Phoenicopterus ruber antiquorum Tenmi. 



Phcknicoptrrus antiquorum Teinminck, Man. dOni., 2iid 

 cd.,II., p. 587 (1820— Europe). 



It is pointed out in the B.O.U. List, 1915, pp. 385-G. that 

 Phoenicopterus roseus Pallas 1827 is antedated by Ph. auti- 



