22 Mr. C. E. Hellmayr on the 



Wing. Tail, 



mm. mm. 



6 : Barra do Eio Negro 53-55 21-23 



2 : Barcellos, Eio Negro 54, 55 20, 22 



5 : Upper Rio Negro (Marabi tanas, R. Icanna, 



RioXie) 55-56 20-22 



6 : N.E. Peru (Pebas, Rio Tigre, Chyavetas) .... 56-60 20-23 

 2 : Rio Napo, E. Ecuador 60 21| 



29 : Bogota skins 56-60 20-23 



1 : Rio Dagua, W. Colombia 57 22 



1 : Santa Marta Moulting. 



16 : Caura River 55-57£ 20-22 



5 : Maipures, Orinoco 54-56 20-21 



4 : Guanoco, Orinoco Delta 55-57 21-23 



1 : Cumana 57 21 



2 : Puerto Cabello 59, 60 25, 24 



17 : Trinidad 57-59 22-24 



The specimens from Cayenne, Surinam, Guiana, the Lower 

 Amazons, and one from Barcellos agree among themselves 

 in having the crown of a pure golden yellow with a distinct 

 blood-red border posteriorly ; those from the Orinoco, Upper 

 Eio Negro (including one from Barcellos), N.E. Peru, 

 E. Ecuador, and most of the Bogota skins have the crown 

 decidedly paler yellow and the red border wanting or 

 barely indicated. The series from Trinidad, Cumana, Puerto 

 Cabello, and Guanoco varies in the contrary direction, the head 

 being much deeper, more orange-yellow, and the red border 

 decidedly broader and of a deeper blood-red. The examples 

 from the Caura River, however, are so variously intermediate 

 betweeu the typical race from Guiana and the orange-capped 

 one from N. Venezuela that I do not venture, for the 

 present at least, to make any separation. In Bogotd col- 

 lections there are occasionally specimens to be found which 

 have the cap quite as bright orange-yellow as those from 

 Trinidad &c. Very likely they come from the mountain- 

 ranges north or west of Bogota. 



7. PlPRA LEUCOCILLA. * 



Pipra leucocilla Linnseus, Mus. Ad. Fridr. ii. Prodr. 



* Whether the specimen from S. Cristobal, W. Venezuela [Scl. & Salv. 

 P.Z. S. 1875, p. 237, " P. leucocilla "], belonged to the typical form or 

 to P. I. coracina must remain doubtful. It is not in the Brit. Museum. 



