22 The late J. H. Gurney on 



The Smithsonian Institution subsequently obtained an 

 additional specimen in the plumage which I now consider to 

 be the normal adult dress^ but without any reliable informa- 

 tion as to the locality where it was originally procured. 

 Both these specimens were described by Mr. Ridgway under 

 the name of Onychotes gruhtri in his ' Studies of American 

 Falconidse/ published in 1876^ p. 135, and were referred to by 

 me under the same title in ^The Ibis^ for 1876^ p. 476, and 

 for 1881, p. 396, the latter notice being accompanied by 

 coloured figures (on pi. 12) of both of them. 



H.M.S. "^ Challenger ' visited the island of Hawaii in 

 August 1875, and brought home amongst other specimens 

 two examples of Buteo solitarius. One of these was for a 

 time accidentally mislaid, but the other, a normal adult 

 female, was recorded in a paper on the collection of birds 

 brought home by the ' Challenger,' contributed by Mr. Sclater 

 to the 'Proceedings^ of the Zool. Soc. for 1878, which included 

 a description of this specimen drawn up by myself, and sub- 

 sequently reprinted in the Official Scientific Report of the 

 Voyage of the ' Challenger,' Zoology, vol. ii. pt. 8, p. 96. 

 This description was in both cases rendered inaccurate by 

 an unfortunate printer's error, owing to which the occiput and 

 hinder part of the neck were misprinted as being " white- 

 coloured " instead of " whole-coloured ;" this error was, 

 however, rendered less important by an accurate coloured 

 figure of the specimen, which formed plate 21 of the ornitho- 

 logical volume of the ' Challenger's ' Report. The missing 

 bird subsequently came to light, and proved not to be very 

 different in plumage from the female which had been figured, 

 though probably a somewhat younger bird. This specimen 

 was described at p. 141 of my ' List of Diurnal Birds of 

 Prey,' published in 1884. 



Both the specimens brought home by the ' Challenger ' are 

 now preserved in the British Museum. 



The figure of Buteo solitarius published in the Report of 

 the ' Challenger ' Expedition struck Mr. Ridgway as so closely 

 resembling the second example of Onychotes gruberi which 

 had been acquired by the Smithsonian Institution that he 



