18/6.] NEOTROPICAL ANATID.E. 377 



P.-B. Anseres, p. 90 ; Pelz. Orn. Bras. p. 319(18/0) ; Reinh. Fugl. 

 Bras. Camj). p. 21 (1870) (Lagoa Santa). 

 Canard du Maragnon, Buff. PI. Eul. 808. 

 Pato cava blanca, Az. Apunt. no. 435. 



Facie tota et macula gutturali albis ; nucha, collo antico, abdo- 



mine medio, cauda, dorso postico et alis nigris ; collo postico et 



humeris castanets; dorso medio et scapular ibus brunneis, plumis 



singulis ochraceo marginatis ; tectricibus alarum olivaceo-nigris ; 



hypochondriis albo nigroque transfasciatis : rostro et pedibus 



nigris : long, tota 17*0, alee 9'0, caudce 2*5, tarsi 20, dig. med. 



cum ungue 26, rostri a rictu 2'2 (Descr. exempl. ex Columbia in 



Mus. S. &G.). 



Hah. Columbia (Mus. S. fy G.) ; Guiana (Schomb.) ; Rio Brancbo 



(Natt.); Trinidad (Leotaud) ; Upper Amazons (Bartlett) ; Peru 



(Tschudi) ; Bolivia (U Orbigny) ; Paraguay (Azara) ; Tucuman (Bur- 



meister) ; Brazil {Maximilian) ; Rio Parana and Cuvaba (Natterer) ; 



Lagoa Santa (Lund) ; Bahia (Wucherer); Cuba (Gundlach). 



This species has a very wide range in South America ; but though 

 its casual appearance in Cuba has been recorded, it has never yet been 

 met with in Central America. Commencing from the valley of the 

 Magdalena it spreads over the whole continent, including the island 

 of Trinidad, as far as the vicinity of Buenos Ayres. In Paraguay, 

 Azara saw it in large flocks of as many as two hundred individuals 

 and more. He notes its cry as " bi-bi-bi," which is uttered as it flies 

 at all hours of the night. The members of a flock fly in a straight line 

 or crescent. 



Grenus 2. Sarcidiornis. Type. 



Sarcidiornis, Eyton, Mon. Anat. p. 20 (1838) . . £. ?nelanonota. 

 This genus appears to be truly Tropicopolitan, and is represented 

 by two or three species or closely allied forms in India, Africa, and 

 America. 



Sarcidiornis carunctjlata. 



"Anas carunculata, 111.," Licht. Abh. Ak. Berlin, 1816-17, p. 176. 



El Pato crestudo, Az. Apunt. no. 438. 



Pato de crista, Max. Beitr. iii. p. 942. 



Anser melanotus, Burm. Syst. Ueb. iii. p. 434. 



Sarcidiornis regia, Hartl. Ind. Az. p. 27 (1847) ; Burm. La Plata- 

 Reise, ii. p. 513 (Tucuman) ; J. f. Orn. 1860, p. 266 ; Scl. P. Z. S. 

 1867, p. 339, 1868, p. 532; Pelz. Orn. Bras. p. 319 ; Scl. & Salv. 

 Nomencl. p. 129. 



Hub. Paraguay (Azara); Tucuman (Burmeister); interior of 

 prov. Bahia (Maximilian) ; Matogrosso and Barra do Rio Negro 

 (Natterer). 



We are unable to give a description of this species, as no authentic 

 South-American examples are at present accessible to us. It is 

 therefore not possible for us to give independent testimony as to the 

 identity or distinctness of the birds found in South America, Africa, 

 and India ; but we have good reason to believe that the South- 

 American form is really separable. 



