200 TYBANNID-a:. 



similar, but rather smaller, and yellow of the crest not so well 

 developed. 



Hab. Cayenne, Guiana, Brazil, Colombia, Ecuador, Panama, and 

 Veragua. 



The tail is rather darker in specimens from Panama and Ecuador, 

 and it is perhaps possible to recognize this form as a subspecies, but 

 in some specimens from Guiana I find the tail very nearly as dark. 



a. Subsp. atricauda. 



a. c? ad. sk. Calovevora, Veragua (Arce). Salvin-Godman Coll. 



b, c. 3 ad. ; Panama (McLeannan). Salvin-Godman Coll. 

 d. Ad. sk. 



e. 5 ad. sk. Panama (McLeannan). Sclater Coll. 



f,ff-d 2 ad.sk. Esmeraldas, Ecuador (Fraser). Sclater Coll. 



h. 3 ad. sk. Babahoyo, Ecuador (Fraser). Sclater Coll. 



i. $ ad. sk. Bemedios, Antioquia, U. S. C. Salvin-Godman Coll. 



(Salmon), 



j, k. Ad. sk. Sarayacu, Ecuador (Buckley). Salvin-Godman Coll. 



b. Subsp. typica. 



I, m. d 2 a ^- s k- Bartica Grove, Brit. Guiana Salvin-Godman Coll. 



( Whitely). 



n. 5 ad. sk. Camacusa, Br. Guiana Salvin-Godman Coll. 



( Whitely). 



o,2h c? ad.sk. Roraima, Br. Guiana (Whitely). Salvin-Godman Coll. 



cJ ad. sk. River Atapurow, Brit. Guiana Salvin-Godman Coll. 



( Whitely). 



r. (J ad. sk. Oyapoc, Cayenne. Sclater Coll. 



s. Ad. sk. Amazons. Purchased. 



t-w. Ad. sk. Bahia, Brazil ( Wucherer). Salvin-Godman Coll. 



.r, y. Ad. sk. Brazil. Sclater Coll. 



2. Myiobius sulphureipygius. 



Tyrannula sulphureipygia, Sel. P. Z. S. 1856, p. 296. 



Myiobius sulphureipygius, Scl. P. Z. S. 1860, p. 465; id. Ibis, 1859, 



p. 442, et 1873, p. 373 ; id. Cat. A. B. p. 226 ; Scl. et Salv. Ibis, 



1860, p. 399 ; iid. Nomencl. p. 51 ; Lawr. Ann. Lye. N. Y. viii. 



p. 8, ix. p. 114; Salv. P.Z.S. 1867, p. 148, et 1870, p. 198; 



Frantz. J.f. O. 1869, p. 308 : Bidgw. P. U. S. N. M. vi. p. 402. 

 Myiobius citiinopygius, Cab. et Hein. Mns. Ilein. ii. p. 67. 

 Myiobius mexicanus, Cab. in Mus. Berol. 



Above olive-green : vertical crest bright yellow, tipped with 

 olive ; wings brownish black, slightly margined with brownish ; a 

 broad band across the rump pale sulphur-yellow ; upper tail-coverts 

 and tail blackish : beneath brownish fulvous ; throat whitish, 

 middle of belly yellowish ; under wing-coverts pale fulvous ; bill 

 brown, base of lower mandible pale ; feet pale brown : whole length 

 5-2 inches, wing 2'5, tail 2'3. Female similar, but rather smaller 

 and yellow crest absent or not so well developed. 



Hab. Mexico and Central America down to Chiriqui. 



