358 BIRDS 



Linne, Zenaida zenaida (Bonaparte), Geotrygon chrysia Salvador!, Speotyto 

 cunicularia floridana Eidgway, Crotopliaga ani Linne, Coccyzus minor may- 

 nardi (Eidgway), and Tyrannus dominiccnsis (Gmelin). 



From the above review of the Bahama avifauna we may derive the follow- 

 ing propositions : 



First. That the Bahamas are oceanic and of comparatively recent origin. 



Second. That the resident avifauna, while it contains a considerable 

 fortuitous element, has been derived largely from the Greater Antilles by way 

 of Cuba. 



Third. That the Florida element is of a more recent origin than that 

 of the Greater Antillean. 



Fourth. That when a species is represented by closely related forms in 

 the Greater Antilles and the United States, the Bahama bird will more 

 closely resemble that of the United States, generally the form found in 

 Florida, or in othjer words, the Bahamas are " arid tropical," which seems to 

 check the deepening of color appearing in forms in the Greater Antilles and 

 southward, as for example, Ochthodromus ivilsonius (Ord). Eallus crepitans 

 coryi (Maynard), Zenaidura macroura (Linne) and Cliordeiles virginianus 

 vicinus Eiley. 



Fifth. That there is a minor faunal region of the rank of a fauna or 

 district, embracing Watlings Island, Eum Cay, Concepcion Island, Long 

 Island, and the islands to the southward. This is the region of least rainfall 

 for the group and consequently less heavy vegetation. 



LIST OF BAHAMA BIRDS. 



The sequence of families in the following list is mainly that elaborated 

 by Mr. Eidgway for his Birds of North and Middle America. Mr. C. B. Cory's 

 Catalogue of West Indian Birds has been my chief source of information, and 

 to his list of Bahama birds given therein, I have added such records as have 

 been published since his book was issued or made such changes as the present 

 state of our knowledge of the subject seemed to warrant. 



N. B. Birds known to breed are marked thus$; those peculiar to the Islands 

 thus f. 



Order COLYMBIFORMES (Diving Birds). 



Colymbus dominions Liune (West Indian Grebe). Eleuthera, Andros, Rum Cay, 



Watlings Island, Long Island. 

 Podilymbus podiceps (Linne") (Pied-billed Grebe). New Providence. 



