324 mpkid^;. 



Above olive-green ; -wings aud tail blackish brown, slightly edged 

 with olive-green ; large vertical patch, occupying the bases of the 

 feathers, lemon-yellow : beneath paler, throat more cinereous, belly 

 more yellowish ; bill and feet pale brown : whole length 5 inches, 

 wing 2-6, tail 2-2. 



Hub. S.E. Brazil. 



a, b. Ad. sk. Brazil. Sclater Coll. 



c. Ad. sk. Brazil. Purchased. 



19. HETEROCERCUS. 



Ileterocercus, Scl. (ex Hartlaub MS.), Cat. A. B. p. 245 Type. 



(1862) H. linteatus 



v 

 Tail of Heterocercus linteatus from beneath. 



This is a very singular type, remarkable for the peculiar form of 

 the tail and the nearly smooth rictus. The foot-structure appears 

 to be Piprine, and I therefore place it here, but am not quite satis- 

 fied that it will always retain this position. 



The three known species of Heterocercus are confined to the forests 

 of Amazonia. 



Key to the Species. 



A. Sides of head black ; coronal patch scarlet. . 1. linteatus, p. 824. 



B. Sides of head olive-green : 



I coronal patch yellow 2.Jlavivertex, p. 325. 



| coronal patch orange 3. aurantiivertex, p. 325. 



1. Heterocercus linteatus. 



Elaenia linteata, Strickl. Contr. Orn. 1850, p. 121, pi. 63 (<S). 

 Ileterocercus linteatus, Scl. Cat. A. B. p. 245 ; Pelz. Orn. Bras. 



p. 125 ; Scl. et Salv. Nomencl. p. 55 ; iid. P. Z. S. 1873, p. 284 



(E. Peru) ; Tact,. Orn. Per. ii. p. 351. 



Above dull olive-green ; wings and tail dark ashy, slightly edged 



