Vol. XXIV, pp. 187-190. June 23, 1911 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTIONS OF NEW AMERICAN BIRDS. 

 BY OUTRAM BANGS. 



The American birds described as new in the following pages 

 are from various sources, and are such as have turned up from 

 time to time during the process of arranging and identifying 

 the collections in the Museum of Comparative Zoology. 



Rupornis magnirostris occidua subsp. nov. 



Type from Rio Tambopata, eastern Peru, adult (d 1 ?), no. 47,."><>2, Coll. 

 Mus. Comp. Zool. Collected by Dr. W. C. Farrabee, in May, 1907. 



Characters. — Similar to true R. magnirostris (Gmelin) of Colombia, 

 Guiana, and Amazonia, with the upper parts pale gray and the belly 

 and flanks barred with white and pale cinnamon-rufous, but with the 

 chest bright cinnamon-rufous as in R. magnirostris natteri (Gel. & Salv. ) 

 of Brazil, not gray as in true R. magnirostris. 



Measurements. — Type, adult (<??): wing, 213; tail, 143; tarsus, 63; 

 culmen, 29. 



Remarks. — The type of this new hawk was brought home, with other 

 birds, by Dr. Farrabee, from his three years' trip to Peru and Bolivia. I 

 tried in vain to reconcile it to either of the recognized subspecies, and 

 upon hunting up the literature found that Hellmayr (Novit. Zool. Vol. 

 XVII, p. 411, Dec. 1910) had already discussed similar specimens, from 

 the same general region, arriving at the conclusion that, in all probability, 

 they represented a third subspecies, intermediate in character between 

 the other two. 



Penelope perspicax sp. nov. 



Type from San Luis, Bitaco Valley, western Colombia, adult 9 , Mus. 

 Comp. Zool., no. 23,606, Bangs Coll. Collected June 5, 1908, by Mervyn 

 G. Palmer. 



( 'haracters. — Somewhat like P. cristata (Linn. ) of Central America but 

 much smaller and with the feathers of crest, hind neck and mantle bor- 

 dered by grayish white; wings, except primaries and bastard wing, 

 metallic; bronzy brownish-like tail; primaries metallic, dark, greenish 



34— Peoc. Biol. Soc. Wash., Vol. XXIV, 1911. (187) 





