Land-birds of Juan Fernandez. 181 



tional Museum of Santiago, transmitted to me specimens of the 

 adult and young of both sexes of this bird, with the information 

 that they had been obtained by collectors sent to Juan Fernandez 

 by the Museum of Santiago, and that as they had been found 

 paired, and as the red and green young had been found together 

 in the nest, there could be no longer any doubt on the subject*. 

 Tlie fact of the young differing at so early a stage is somewhat 

 unusual, but is not without parallel. In the case of the Upland 

 Goose {Chloephaga magellanica) there is nearly as early a diver- 

 gence of the sexes f. 



4. EusTEPHANUs LEYBOLDi, Gould, Ann. Nat. Hist. ser. iv. 

 vol. vi. p. 406. 



Under the name Eustephanus lei/bo/di, Mr. Gould has described 

 a green Humming-bird from Mas-afuera closely resembling the 

 so-called E.stokesi {i. e. the female of E.fernandensis), but dif- 

 fering in having the throat differently spotted, so as rather to 

 resemble E. galeritus, and the inner webs of the rectrices wholly 

 white. Several red Humming-birds collected at the same time 

 differ slightly from the male of E.fei-nandensis. Not having my- 

 self the slightest doubt of E. stokesi being the female of E.fer- 

 nandensis, I have also no doubt that Mr. Gould^s green E. ley- 

 boldi is the female of the corresponding red bird of Mas-afuera. 

 Although in representative species the females are often similar, 

 while the males differ, it is possible that the contrary may 

 sometimes be the case ; and here, I suppose, we have an instance 

 of it. I therefore adopt leyboldi as the specific name for the 

 Eustephanus of Mas-afuera. 



5. Eustephanus galeritus (Mol.) . 



Trochiius galeritus, Mol. : Eustephanus galeritus, Gould, Mon. 

 Troch. vol. iv. pi. 265. 



Trochiius sephanoides. Ph. et Landb. Cat. Av. Chil. p. 9. 



There can be no doubt, I think, of this Chilian species being 

 also found in Mas-a-tierra, although it would not appear to be 



* See my remarks on exhibiting these specimens to the Zoological 

 Society, P. Z. S. 1866, p. 556. 



t Cf. P. Z. S. 1858, p. 289. [Also cf. Darwin, Descent of Man, ii. 

 p. 219.— Ed.] 



