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Show 412 SCLATER AND SALVIN ON NEOTROPICAL ANATID.E. [Apr. 4, we have the following 23 species of Neotropical Anatidae belonging to genera also met with in the north-namely Bernicla melanoptera, Querquedula flavirostris, magellanica, andium, dispar, versicolor, poliocephala, puna, rubidiceps, torquata, antarctica, brasiliensis, Cygnus nigricollis, Dafila spinicauda, coscoroba, bahamensis, Anas specularis, Mareca sibilatrix, cristata, Spatula platalea, Querquedula cyanoptera, Mergus octosetaceus. oxyptera, Lastly, there are 4 generic forms of Anatidae peculiar to the Antarctic portion of the Neotropical region (Heteronetta, Metopiana, Tachyeres, and Merganetta), embracing the following six species- Heteronetta melanocephala, Merganetta armata, Metopiana peposaca, turneri, Tachyeres cinereus, leucogenys. The Neotropical Anatidae may therefore be summarized as follows :- A. Nearctic species, mostly occurring only in winter within the Neotropical Region .... 23 B. Neotropical species. a. Species belonging to Tropicopolitan genera 8 b. Representatives of a Cosmopolitan genus 2 c. Peculiar species of genera also Arctic.. 23 d. Species of peculiar Antarctic genera. . 6 39 62 |