610 MR. P. L, SCLATER ON NEW AMERICAN BIRDS. [Noy. 22, 
the scutella being obsolete, if not imperceptible. The claws are short 
and curved, as in other members of the genus. The wings are short 
and rounded, the fifth, sixth, seventh, eighth, and ninth primaries 
being nearly equal and longest. On the whole, the form is subgene- 
rically (if not generically) distinct, and may stand as a separate 
section (for which I propose the name Liosceles*) to connect Pée- 
roptochus with Agathopus. 
The late Dr. J. Natterer obtained his specimens of this bird at 
Salto do Girao, on the left bank of the Rio Madeira, in Oct. 1829. 
They were found on the ground in the forest. The following are 
his notes, as kindly communicated to me by Herr von Pelzeln :— 
*‘ Die Nasenlécher haben einen stark erhabenen, ovalen, hautigen 
Deckel. Keine Barthaare. Iris dunkelbraun, die Augendeckel 
eraulichweiss. Der Schnabel ist schwarz, die Mundwinkel und die 
unterste Halfte des Unterschnabels (der Linge nach) sind graulich- 
weiss. Fisse dunkelbraun, die innere Seite der Tarsen samt der 
oberen Seite der mittel- und inneren Zehen hautfarben, die Zehen 
aber ins Dunkelbraune tibergehend, Klauen dunkelbraungrau. Der 
Schwanz sehr keilférmig.”’ 
* )etos, levis, et oxéXos, crus. 
