398 MESSRS. SCLATER AND SALVIN ON [Apr. 4j 



Subfamily IV. Fuligulinj:. 



The Sea-ducks are essentially arctic in their distribution. One 

 peculiar form only (Micropterus) occurs on the coast of Antarctic 

 America. A second form (Metopiana), though belonging to this 

 group, seems to be only met with on fresh water. 



Genus 1. Metopiana. Type 



Metopiana, Bp. C. It. xliii. p. 146 (1856) M* peposaca. 



Some authors have been inclined to associate this peculiar Duck 

 with the Anatinse ; but though it is, we believe, strictly an inhabitant 

 of fresh water, and has not the lobated hind toe of the typical Fuli- 

 gulinse, it possesses their peculiarity in the structure of the trachea, 

 as mentioned by Burmeister (La-Plata Reise* ii. p. 518), and as 

 recently described and figured by Garrod (P. Z. S. 18/5, p. 154). 



Metopiana peposaca. 



Pato neyrizco ala blanca, At. Apunt. no. 430 (Paraguay and 

 Buenos Ay res), unde 



Anas peposaca, Vieill. N. D. v. p. 132 (1816), et Enc. Meth. 

 p. 357 (1823); Hartl. Ind. Az. p. 27 5 Burm. La Plata-Reise, ii. 

 p. 518, J. fur Orn. I860, p. 227 (Parana). 



Fuligul a peposaca, Schl. Mus. des P.-B. Anseres, p. 31. 

 Anas metopias, Poppig, Fror. Notiz. no. 529, p. 9 (1829). 

 Fuligula metopias, Gay, Faun. Chil. p. 456 (1848); Hart!. 

 Naum. 1853, p. 217; Cassin, Gilliss's Exp. ii. p. 204, t. xxvii. 

 (1856) Chili; Scl. P. Z. S. (1867), 335; Reich. Nat. t. cclxxxv. 

 f. 2350; Phil. & Landb. Cat. Av. Chil. p. 43. 



Metopiana peposaca, Bp. C. R. xliii. p. 146 (1856) ; Scl. & Salv. 

 P. Z. S. 1868, p. 146 (Buenos Ayres), et Norn. Av. Neotr. p. 130 ; 

 Scl. P. Z. S. 1870, p. 666, t. 37; Garrod, P. Z. S. 1875, p. 154. 

 Anas albipennis, Licht. MS. 



Nigra, in dor so minutissime albo irrorata, cervice postica et 



capite superiore toto nitore purpureo indutis ; secundariis 



a/bis, nigro terminatis et tectricibus nigris obtectis, speculum 



album efficient ibus ; primariis grisescenti-albis, horum quatuor 



externis in pogonio exterior e et omnium apicibus nigris ; ventre 



toto griseo et albo minutissime vermiculato ; crisso albo ; 



rostro rosaceo, ad basin tumido ) pedibus fiavis : long, tota 



19*0, alee 9'4, caudce 28, tarsi 17, rostri a rictu 2*3. Fern. 



supra brunnea, campterio et speculo atari albis; subtus alba t 



pectore et hypochondriis rufescenti-brunneis, rostro obscuro, 



pedibus cornels (Descr. exempl. ex Monte Video). 



Hub. Paraguay (Azara) ; Buenos Ayres (Hudson) ; Monte Video 



Johnston in Mus. S.-G.); Parana (Burm.); Ch\}i(P/ril. et Landb.). 



This beautiful Duck was first obtained by Azara, who, however, 



gives no details respecting it ; but Burmeister tells us it is very 



common on the Parana ; and Mr. Hudson obtained specimens near 



Buenos Ayres. In the central part of Chili, Philippi and Landbeck 



state that it is common, but rare iu the southern provinces. 



