182 Mr. P. L. Sclater on the 



likely that such would be the case. E. galeritus was, I believe, 

 the third species of Humming-bird obtained by Captain King 

 in Mas-a-tierra ; and Mr. Gould tells me that Mr. Bridges 

 likewise brought specimens of it from the same island. Messrs. 

 Philippi and Landbeck also record its occurrence in Juan Fer- 

 nandez in their catalogue of the birds of Chili. 



6. BUTEO ERYTHROXOTUS (King). 



Haliaetus erythronotus, King : Buteo erythronotus, Strickl. 

 Orn. Syn. p. 34; Ph. et Landb. Cat. de las Aves Chilenas, 

 p. 3. 



Mr. Salvin procured a skin of this Buzzard, from a collec- 

 tion sent to this country by Mr. Keed, which was labelled as 

 coming from Mas-afuera. It was, no doubt, obtained by the same 

 collector who discovered Eustephanus leyboldi in that island. 



It appears therefore that the terrestrial avifauna of the Juan 

 Pernandez Islands, so far as it is yet known, comprehends only 

 six species. These may be divided into two categories. 



1. Species known to occur elsewhere — Eustephanus galeritus 

 and Buteo erythronotus. 



2. Species not known to occur elsewhere — Anceretes femande- 

 zianuSy Oxyurus masafuerce, Eustephanus fernandensis, and JE^. ley- 

 boldi. 



As regards the first category, it is sufficient to remark that the 

 two species contained in it are both well-known inhabitants of 

 Chili. 



As regards the second category, the first two in the list, 

 although specifically distinct, are more nearly related to Chilian 

 species than to any others, and are, in fact, representative 

 species — the former of A. parulus, and the latter of O. spini- 

 cauda. 



The case of the Humming-birds requires a little more con- 

 sideration. There can be no doubt that their nearest ally is 

 Eustephanus galeritus of Chili, the only other known member of 

 the genus Eustephanus ; but as E. galeritus itself occurs in Mas- 

 a-tierra, it w'ould be, at first sight, incorrect to call them repre- 

 sentative species. Yet I think there can be no doubt that this 

 is really the case, and that we have here an interesting example 



