366 Messrs. A. and E. Newton's Observaiiofis 



ruber of Linnaeus — are said to have formerly visited St. Croix 

 })eriodically, and even of late years a few seem to have been 

 occasionally observed : on the south side of the leeward end of 

 St. Thomas, a large indentation still bears the name of Fla- 

 mingo-pan Bay. 



51. Black-billed Whistling Duck. Dendrocyyna arhorea, 

 Eyton. Anas arborea, L. : Edw. Birds, pi. 193; PI. Enl. 801. 

 " Mangrove Duck." 



This species is pretty common on the Mangrove Lagoons, but 

 much oftener heard than seen. The whistling noise it makes 

 while flying causes it to be well known by persons who have 

 never even set their eyes on a specimen; for it is chiefly at night 

 that it quits its solitary haunts to feed. It probably breeds in 

 the island ; but we have no positive authority for saying that it 

 does so, and we regret we cannot furnish more information re- 

 specting it. 



" I procured specimens of both sexes ; and, as the trachea of 

 no one member of the genus Dendrocrjgna has been figured, that 

 I am aware of, T am glad to be able 

 to give a representation of the or- 

 gan in this species. The labyrinth, 

 ixi form, may recall that of the Gar- 

 ganey [Pterocyanea circia, Bp.), but 

 is sufficiently different from it in 

 many respects. 



" I have not seen specimens suf- 

 ficient to be able to record the sea- 

 sonal changes of plumage in this 

 species. A male, killed July 21st, 

 1858, bore no sign whatever of 

 moulting. In general aj)pearauce it 

 greatly resembled a female obtained September 17th, 1858. 

 The iris was brown, the bill black, legs dull ash-grey, the feet 

 darker, and the claws black." — E. N. 



52. [?] American Scaup Duck. Fulix affinis, Baird. Anas 

 marila, Wils. pi. 69. fig. 3 ; Fuligula affinis, Eyton ; Anas ma- 

 rilo'ides, Vigors, nee Yarrell. 



