( 101 ) 

 191. Aegialitis collaris (Vieill.). 



Charadrias riillarix Vieillot, Nouo. Diet, xxvii. p. 13G (1818. — ex Azara No. 392 : Paraguay). 



Nos. 2193, 219."). SS ad., Rio Aragnaya, June 1900. 



Agreeing witli sjiccimen.s from Bneiios Ayres, but with a rather stontcr hill. 



192. Hoplopterus cayanus (Lath.). 



CliiiralriHn mijmniK Latham, Ini?. Oni. ii. p. 740 (1790. — ex BufEon and Danbentnn : " Cay.ina "). 

 No. 1700. cJ ad., Faz. Esperan^a, January 1900. 



193. G-allinago paraguaiae (Vieill.), 



Scolopax Paraguaiae Tieillot, Noiir. Diet. iii. p. 350 (181G, — ex Azara no. 387 : Paraguay). 

 Scolopax frenata Lichtenstein, Verz. Duhl. Berliner Jlii-i, p. 75(1823. — ex Azara no. 387 ; Paraguay). 



Nos. 1707, 1787. ? and an adult, not se.xed, Faz. Esperanea, January 1900. — 

 Wing 120, 122 ; hill 72, 68 mm. 



Nos. 2268, 2269, 2270. 3S6, Rio Araguaya, July 1900.— Wing 118, 124; 

 bill 62, 65, 68 mm. 



Cf. the remarks of Count Berlopsch, .Tourn. f. Oi-nith. 1887. p. 30. 



194. Podiceps dominicus brachyrhynchus (Chapm.). 



\Colymhis {lomimnix Linnaeus, Si/st. Nat. xii. 1. p. 223 (1766. — "S. Domingo'' : ex Bri,sson).] 

 Cnh/mbui dnminicus brachyrhynrluia Chapman, liiill. Aiiier. lliis. xii. 18'.l!t. p. 255 (1900. — Chapada 

 Mattogrosso). 



Nos. 16.54, 1055. (?c? (in non-breeding plumage), Faz. Esperanea, December 

 1905.— Bill 18, 21 mm. 



The characters of this race have been correctly pointed out liy Jlr. Chapman (Lc-)- 



195. Alopochen jubata (Spix). 



Atiner juhalux Spix, Av. Bras. ii. p. 84. tab. cviii. (1825. — " ad ripas fl. Solimoiiis in insula ' Praya 

 das On^as'"). 



Nos. 2259, 2341. SS, Rio Aragnaya, July 1906. 



Differ from Orinoco specimens only by having the blackish brown abdominal 

 patch rather duller and less conspicuous. 



196. Dendrocygna autumnalis discolor Scl. & Salv. 



\^Anas aultimuaUn Linnaeus, Si/.-it. Xat. xii. 1. p. 205 {17GIJ. — ex Brisson and Edwards: ''in 



America").] 

 Deinlrni'i/r/im discolnr Sclater it Salvin, X^omencl. Ar. Ncnirop. p. IGl (1873. — "Venezuela, Guiaua 



et Brasilia" — the type is from Maroni River, Surinam. Cf. Salvadori, Cat. B. Brit. Mus. xxvii. 



p. 1G2). 



Nos. 2200, 2261, 2262. <? ? ad., J juv., Rio Araguaya, July 1902. 



These specimens agree in every respect with our large series from Surinam, 

 Trinidad (Caroni Swamps), Ecuador, the Orinoco Valley, etc., etc. 



/'. (li.scolor is ajiparently a geographical form of D. autumnalin, and therefore 

 more correctly culled by a trinomial appellation. 



