4 PALAMEDEIDJ;. 



Adult male. Feathers of the top of the head black, mixed with 

 white ones ; neck and upper parts glossy black, feathers of the 

 lower part of the neck in front and on the sides grey, with a black 

 band at the tip ; breast black ; abdomen white; under tail- coverts 

 black ; wings glossy black, but the smaller wing-coverts white, 

 those near the median black edged with white; carpal edge 

 white ; base of the primaries, including the base of the shafts, 

 white ; under wing-coverts whitish ; tail black : " iris bright 

 orange : upper mandible dark brown-grey, lower mandible paler ; 

 frontal horn yellowish white ; legs and feet ashy grey " (Wied). 

 Total length about 34 inches, wing 22-5, tail 11, culmen 1'4, 

 tarsus 4*4. 



Female. Similar to the male, but, according to Prince Neu- 

 wied, the grej' feathers of the neck are shorter, the anterior part 

 of the head and the upper neck more brownish ; a female in the 

 British Museum has the smaller wing-coverts buff. 



Hab. Guiana, Venezuela, and Amazonia, west as far as Ecuador 

 and Eastern Peru. 



a. Ad. sk. S. America. 



b. 2 ad. sk. Upper Ucavali. E. Bartlett, Esq. 



c. Ad. sk. Balzar Mts., Ecuador Salvin-Godmau Coll. 



[Illhiffworth). 



d. Right metacarpus. 



2. CHAUNA. 



Type. 



Chauna, llliy. Prodr. Mamm. et Av. p. 25.3 (1811) .... C. cristata. 



Chavaria, Rajinesque, Analyse, p. 70 (1815). 



Opistholophus, J'ieill. Analyse, pp. 60, 70 (1816) C. cristata. 



Ischyrornis, Rchnb. Av. Sijst. ^at. p. xxi (1852) C. chavaria. 



Ischyornis, Bp. Compt. Rend, xliii. p. 598, gen. 100 (1856). 



Raneje. Confined to South America. 



Key to the Species. 



a. General plumage slate-black ; cheeks and throat 



white, sharply defined from the black neck . . chavaria, p. 4. 



b. General plumage dark grey : cheeks and throat 



grey ; a naked ring round the neck cristata, p. 6. 



1. Chaima chavaria. 



Parra chavaria, Linn. S. N. i. p. 260, n. 8 (1766) (Carthagena, 

 Jacquin) ; Gm. S. N. i. 2, p. 709, n. 5 (1788) ; Lath. Ind. Orn. 

 ii. p. 264, n. 9 (1790). 



Faithful Jacana, Lath. Syn. iii. 1, p. 246, n. 9 (1785). 



Palamedea chavaria, Geoff r. Bull. Sc. Soc. Philom. i. 2, p. 50 (1797) 

 (Carthagena). 



Chavaria, Soiin. in Buff. Hht. Nat. lix. p. 227 (an. xiii.). 



Chauna chavaria, part., /%. Prodr. M. et A. p. 254 (1811) : Cm: 



