1866.] COLLECTED ON THE RIVER UCAYALI. 189 



1 10. Elainea, sp. 1 

 Hab. Upper Ucayali. 



One example of a species belonging to the golden-crested group 

 containing E. placens and its allies. 



111. Myiozetetes, sp. ? 



Hab. Sarayacu. 



One example of a young bird of this genus. 



112. Myiozetetes cayennensis (Linn.). 

 Hab. Nauta. 



113. Rhynchocyclus megacefhalus (Sw.). 

 Hab. Upper Ucayali. 



114. Pitangus sulphuratus (L.). 

 Hab. Nauta. 



115. Myiobius n.evius (Bodd.). 

 Hab. Lower Ucayali. 



116. Myiobius, sp. 



Hab. Upper Ucayali. 



One specimen in bad condition, which we are unable to determine. 



117. Myiobius xanthopygius (Spix). 

 Hab. Upper Ucayali. 



118. Pyrocephalus rubineus (Bodd.). 

 Upper and Lower Ucayali. 



119. Myiarchus, sp. ? 



Hab. Upper Ucayali. 



Two examples of an undetermined species in Sclater's collection. 



120. Empidonomus varius (Vieill.). 

 Hab. Upper Ucayali. 



121. Tyrannus melancholicus, Vieill. 



Hab. Nauta and Sarayacu. 



Many specimens of this widely distributed species. 



122. Tyrannus pipiri, Vieill. 



Hab. Nauta. 



Two specimens. In our opinion indistinguishable from North- 

 American specimens. D'Orbigny (Voy. p. 313) has noticed this 

 species as far south as Santa Cruz de la Sierra in Bolivia. 



123. Tyrannus, sp. 



One skin, from the Upper Ucayali, apparently referable to a new 



