

Lijpaugus unirufus is nearly of the same form as L. ctneraceus of Cayenne and the Amazon- 

 valley, having the two outer toes partially united at their bases, but has the wings rather 

 differently proportioned, the third primary being longest instead of the fifth, and the primaries 

 generally less pointed. It is also rather larger than L. ctneraceus, and totally different in 

 colour. It is very singular that all the three Central American representatives of this group 

 of birds, belonging to three separate and easily distinguishable sections, should be of a general 

 cinnamon-brown colour, while all the South American members of the genus are more or less 



cinereous. 



Octobee, 1866. 



[2] 



D9 



