198 AEDEIBai, 



Adult male (type of species). Blackish brown above, plentifully 

 and finely barred with sandy buff, a little more broadly on the neck ;. 

 wing-coverts like the back, the greater series freckled minutely with 

 whitish : bastard-wing, primary-coverts, and quills black, externally 

 slaty grey, tipped with white ; the inner secondaries like the back ; 

 tail slaty black, glossed with green ; crown of head and nuchal crest 

 black ; sides of face grey, with a few sandy-buif cross-bars ; cheeks 

 grey, with a black line extending from below the eye down the 

 sides of the neck and skirting the upper throat, which is bare ;, 

 centre of throat feathered, white ; centre of lower throat and fore- 

 neck broadly streaked with white and rufous, and laterally with 

 black ; remainder of under surface pale rufous, lighter on the 

 abdomen ; axiUaries, sides of body, and flanks uniform slaty grey ; 

 the wing-coverts white, with dusky bases to the feathers ; sides of 

 the upper breast greenish black, with fine lines of tawny buff: 

 " iris yellow" (T. K. Salmon). Total length 27 inches, culmen 3-1, 

 wing 11, tail 4. 



This species is easily recognized by its uniform grey flanks, but it 

 seems to have a young plumage of tawny and black, like the other 

 Tiger Bitterns. There is also another stage, more rufous than the 

 one described, and with the head not black, but barred with rufous 

 and black like the back. 



Hah. Colombia to Ecuador and Peru. 



fl. (5 ad. ; 6. Juv. Cauca Valley, U.S. Colombia Salvin-Godman Coll. 



sk. {T. K. Salmon). (Type of species.) 



c. d. Ad. et juv. MedeUin (T. K. Salmon). Salvm-Godman Coll, 



sk. 



e. cJad.sk. Minca, U.S. Colombia, Jan. 22 Salvin-Godman Coll. 



{F. A. Simons). 



f. Ad. sk. Sarayacu, Ecuador ( C. ^McA:- Salvin-Godman Coll.^ 



ley). 



g. Ad. St. South America. Old Coll. 



25. HETEROCNUS. 

 Range. Central America from Mexico to Panama. 



1. Heterocnus cabanisi. 



Tigrisoma tigrinum {nee Gm.), Scl. P. Z. S. 1858, p. 359 (Tigre Isl., 

 Honduras); G. C. Taylor, Ibis, 1859, p. 151 (Honduras); Scl. 8f 

 Salv. t. c. p. 226 ; .SW. P. Z. S. 1860, p. 253 (Orizaba) ; Salvin,. 

 Ibis, 1865, p. 191 (Guatemala). 



Tigrisoma brasiliense {nee L.), Moore, P. Z. S. 1859, p. 63 (Aloor R. ; 

 Omoa, resident). 



Tigrisoma cabanisi, Heine, J. f. O. 1859, p. 407 ; Scl. S,- Salv. P. Z. S. 

 1867, p. 280 (Mosquitia) ; iid. Ex. Orn. p. 95. pi. xlviii. (1868) ; 

 Later. A?m. Lye. N. Y. ix. p. 142 (1870 : Costa Piica) ; Sali\ 

 P. Z. S. 1870, p. 218 (Laguua del Castillo, Veragua) ; Later. Bull. 

 U.S. Nat. Mus. no. 4, p. 49 (1875: Tebuantepec; Puebla) ; Scl, 

 Sf Salv. Nomenel. Av. Neotr. p. 125 (1873j ; Nutting, Proc. U.S. 

 Nat. Mus. V. p. 406 (1882 : Gulf of Nicoya, Costa Pica), vi. 



