Recenthj published Ornilholoyical Works. 537 



Museum at Pittsburg. Two hundred and two species 

 (including subspecies) have now been recorded from the 

 Bahamas, and although there are probably only a few more 

 insular forms to be discovered, additions may still be made 

 to the list of water-birds and accidental visitors. 



Of the two hundred forms already registered in the Bahaman 

 Avifauna about one half are winter-residents, transients on 

 migration, or casual visitors, leaving only about one hundred 

 species known to reside and breed in the islands. Deducting 

 the water-birds and other widely spread species, Mr. Clvde- 

 Todd finds 41 forms the distribution of which within the 

 group is more or less restricted. These again may be divided 

 into two categories, 31 forms confined to the more northern 

 islands and 10 more or less restricted to the more southern 

 and eastern islands. The former of these may be called 

 " Inaguan " and the latter the " Bahaman " Avifauna, 

 although no hard and fast line can be drawn between the 

 two. At tlic same time it is obvious that the Bahaman 

 Avifauna is not homogeneous, and that the Ornis of the 

 north-western islands resembles that of Cuba more closely 

 than that of the South-eastern group. After a discussion of 

 these and other points about the distribution of Bird-life in 

 the Bahamas, we have a narrative of the expedition from the 

 pen of Mr. Worthington and a systematic list of the 82 

 species represented in the collection by Mr. Clyde-Todd. 

 It will be observed that in several cases the latter writer does 

 not quite agree with previous authorities as to the validity 

 of some of the '^ subspecies " that have been instituted 

 for the Bahaman local forms. In some instances it is evident 

 that the differences pointed out are indeed very small and 

 apparently hardly constant. 



57. Du Bois on the Hornbills, 



[Genera Avium, conducted by P. Wytsumn. Part II. Bucerotidae, by 

 Ur. A. Du Bois. Brussels, 1911.] 



The Hornbills are clearly divisible into two subfamilies — 

 the Ground- Horn bills (Bucorvinse) and the Tree-Hornbills 

 (Bucerotidse). Of the former there are only two well-marked 



