394 MESSRS. SCLATER AND SALVIN ON [^P r - 4, 



Rufescenti-fusca, phimis in centro nigricantibus ; dorso postico 

 nigricante ; tectricibus caudce superioribus cum cauda cervinis, 

 rectricibus mediis dilutioribus ; alis obscure schistaceo-nigris , 

 speculo late ceneoviridi, supra et subtus fascia saturate cervina 

 marginato et fascia altera subterminali subtus ornato ; secun- 

 dariorum intimorum marginibus externis cervinis, cum speculi 

 marginibus concoloribus ; subtus fuscescenti-cervina, omnino ob- 

 solete nigro guttata, gvtture toto cumgenis et cervice antica pure 

 albis ; rostro nigro, macula ad basin utrinque rubra ; pedibus 

 fuscis: long, tota 180, alee 8*4, caudce rectr. med. 5, ext. 2*8, 

 tarsi 1*5, rostri a rictu 1'9. Fern, mari similis. 

 Hub. British Guiana ( Schomb.) ; Praia de Cajutuba, near Para 

 (Natt.) ; S.E. Brazil {Max. et Burm.); Buenos Ayres (Azara et 

 Burnt.); Patagonia (Darwin, King); Falklands (Abbott); Chili 

 (Ph. et Landb.); Galapagos (Darwin et Habel). 



Linnseus established his Anas bahamensis upon the Ilathera Duck 

 of Catesby, of which that author tells us a single specimen was 

 procured in the Bahama Islands. Catesby 's figure most undoubtedly 

 represents the present species ; but if his locality is correct, the bird 

 obtained was probably a straggler, as we have no other authentic 

 record of its occurrence north of Guiana, where Schomburgk noticed 

 it in flocks on the mouths of the rivers. Azara obtained two speci- 

 mens of this Duck in a lagoon on the pampas of Buenos Ayres ; 

 and Darwin records it from Bahia Blanca in Northern Patagonia. 

 Burmeister says it is spread abundantly over the whole of Brazil in 

 ponds and marshes, and that it is nearly the commonest species of 

 Duck there. He also observed it numerous in the La-Plata district, 

 as well as on the Rio Uruguay. It is also common near Buenos 

 Ayres, and is often seen exposed for sale in the market. On the 

 Parana and further westwards Burmeister did not observe it. 



In Chili it is of uncertain occurrence, some years there being none 

 to be seen, whilst in others it appears in plenty. Philippi and Land- 

 beck remark that it is also found in Peru ; but we have not yet seen 

 examples from that locality. Mr. Darwin procured one specimen 

 from a small salt-water lagoon in the Galapagos archipelago in the 

 month of October ; and Dr. Habel also obtained three individuals 

 in that group of islands, and says it is not uncommon there. In 

 the Falkland Islands it appears as a straggler from the mainland. 



Genus 8. Mareca. Type. 



Mareca, Stephens, G. Z. xii. pt. 2, p. 130 (1824). . M. penelopc. 



Two Widgeons occur within the limits of the Neotropical Region, 

 one of which is a winter migrant from the north, the other a pecu- 

 liar Antarctic species of rather abnormal form. 



1. Mareca Americana. 

 Le Canard jensen, Buff. PI. Enl. 955, unde 

 Alias americana, Gm. S. N. p 526 (1788). 



Mareca americana, Steph. G. Z. xii. pt. 2, p. 135 ; Baird, B. of 

 N. Am. p. 783; Cab. J. fur Orn. 1857, p. 227 (Cuba); Scl. & 



