350 ON THE BIRDS OF THE SANDWICH ISLANDS. [Mar. 19, 



dominating over the buffy- white on the flanks, and almost entirely 

 covering the sides of the breast. 



" Mr. Cassin further describes the type specimen as having the 

 • occiput and neck behind with oblong longitudinal spots of umber- 

 brown, which is the colour also of all the upper surface of the body, 

 wings, and tail ; shafts of quills reddish chestnut on their upper 

 surface, white beneath ; inner webs of quills widely edged with white ; 

 tail beneath silky-white tinged with yellowish.' 



"The 'Challenger' specimen agrees with this portion of Mr. Cassin's 

 description, with the following exceptions, viz. : — the occiput and 

 hinder part of the neck are white-coloured and of the same hue as the 

 mantle ; the upper surface of the shafts of the quills is brown, but 

 without any ' reddish-chestnut ' tint ; the upper surface of the tail 

 is brown, with transverse bars of a darker brown ; on the middle pair 

 of rectrices these are eleven in number, the lowest bar being subtermi- 

 nal ; on all the rectrices the edge of the outer web and the tip are ot 

 a darker brown than the remainder of the feather, but beyond the 

 dark tip there is at the extreme end of the feather a small central 

 spot of white, which is more conspicuous on a new rectrix only par- 

 tially grown than in the older feathers, from some of which it has 

 been worn off by use ; the inner webs of the lateral rectrices are also 

 more or less mottled with white towards the edge. The dark trans- 

 verse bars are indistinctly apparent on the under surface of the tail. 



" The figure of the type specimen (U.S. Exploring Expedition, 

 pi. iv.) agrees with the description given by Mr. Cassin, and also shows 

 a larger bare space behind the eye than exists in the 'Challenger' 

 specimen; but, notwithstanding this difference and those of coloration 

 to which I have alluded, I think that the coincidence of size and form 

 marks the two specimens as belonging to the same species, and that 

 the example obtained by the ' Challenger ' Expedition must be con- 

 sidered as a specimen of Buteo solitarius of Peale." 



11. Anas wyvilliana, sp. nov. 



" Anas boschas," Dole, Pr. Boston S. N. H. xii. p. 305 ; Finsch 

 et Hartl. Orn. C. P. p. xxxix. (?) 



ff I' ™ a ! e ' 1 Eyes brown ; legs and feet orange. 

 542. Male. J J ° ° 



Supra nigra, plumis fusco limbatis ; pileo nigra, fusco minute punc- 



tato ; subtus pallidefusca, ingutture etpectore magis rufescens, 



in ventre magis ochracea, plumis nigro punctatis et maculatis ; 



alis exius brunnescenti-cinereis ; speculo amplo purpureo, mar- 



gme supra et infra albo bide nigro ornato ; axillaribus albis ; 



rostro superiore nigro, inferiore cameo ; pedibus aurantiacis. 



Long, tota 15-0, ala 93, cauda 3*0, rostri a rictu 2*0, ejusd. 



lut. sub naribus 0*7, tarsi 15. 



Hab. Inss. Sandwich, maris Pacifici. 



This Duck belongs to the section of true Anas which embraces A. 



obscura of North America, A. superciliosa of Australia, and other 



species, and in which both sexes somewhat resemble the female of 



Anas boschas. The head is dark, finely pointed with brown, and 



