412 SCLATER AND SALVIN ON NEOTROPICAL ANATIDE. [Apr. 4, 



we have the following 23 species of Neotropical Anatidae belonging 

 to genera also met with in the north — namely 



Berniela melnnoptera, 



magellanica, 



dispar, 



poliocephala, 



ruhidiceps, 



antarctica, 



Cygnus nigricollis, 



coscoroba. 



Anas specularis, 



cristata, 



Querqup.dula cyanoptera, 

 oxyptera, 



Querquedula fiavirostris, 



andium, 



versicolor, 



puna, 



torquata, 



brasiliensis, 



Dafila spinicauda, 



bahamensis, 



Mareca sihilatrix, 

 Spatula platalea, 

 Mergus octosetaceus. 



Lastly, there are 4 generic forms of Anatidae peculiar to the 

 Antarctic portion of the Neotropical region {Heteronetta, Meto- 

 piana, Tachyeres, and Merganetta), embracing the following six 

 species — 



Heteronetta melanocephala, Merganetta armata, 



Metopiana peposaca, turneri, 



Tachyeres ciiiereus, leucogenys. 



The Neotropical Anatidae may therefore be summarized as 

 follows : — 



A. Nearctic species, mostly occurring only in 

 winter within the Neotropical Region .... 



B. Neotropical species. 



a. Species belonging to Tropicopolitan 



genera 



b. Representatives of a Cosmopolitan 



genus 



c. Peculiar species of genera also Arctic. . 



d. Species of peculiar Antarctic genera. , 



23 



2 



23 



6 



-39 



62 



