84 ■ FALCONIDiE. 



Of this magnificent species very little is known. In 1865 a collection arrived from 

 Arce from Costa Rica, containing a specimen which was described by Dr. Sclater i. 

 Since that time we have met with but one example, procured by Endres, and now 

 in our collection. The U. S. National Museum possesses a third, obtained from 

 Van Patten. 



L. princeps is one of the rarest of the Birds of Prey, and nothing is known 

 respecting its habits or economy. 



3. Leucopternis plumbea. 



Leucopternis plumbea, Salvin, Ibis, 1872, p. 240, t. 8 ' ; Sharpe, Hand-1. Birds, i. p. 258 ''. 

 Urubitinga plumbea, Sharpe, Cat. Birds Brit. Mus. i. p. 216 ^ ; Ridgw. Bull. U. S. Geol. Surv. ii. 

 p. 172^ 



Plumbea, alis et cauda nigricantibus, hac fascia mediana alba, ilUs snbtus albis ; remigibus ad apicem leviter 

 fasciatis; tibiis albido leviter sed orebre fasciatis; rosfcro nigro, cera, mandibulae basi et pedibus 

 flavis. Long, tota circa 14-0, alse 9-0, caudee 5*5, tarsi 2-7. (Descr. exempl. ex Veragnas, Panama. 

 Mus. nostr.) 



Hal. Panama ^, Veraguas [Arce). — Ecuador ^. 



L. plumbea, which shows in its sombre style of coloration a resemblance to a 

 JJrulitinga, was originally described by us from a specimen sent to Mr. Higgins from 

 Ecuador, probably from one of the valleys of the Andes in the vicinity of Quito. We 

 afterwards received an example from Sarayacu, from Buckley. The British Museum 

 has another from Panama, and Arce sent us a fourth from Veraguas. Nothing is 

 known of its habits. 



4. Leucopternis semiplumbea. 



Leucopternis semiplumbea, Lawr. Ann. Lye. N. Y. vii. p. 288' ; ix. p. 133 ^ ; Sol. & Salv. Ex. Orn. 



p. 121, t. 61 '; V. Frantz. J. f, Om. 1869, p. 868 * ; Salv. Ibis, 1872, p. 243 ' i Ridgw. Bull. 



U. S. Geol. Surv. ii. p. 178'; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 126'; Ridgw. 



Pr. U. S.Nat. Mus. x. p. 592'; Sharpe, Hand-1. Birds, i. p. 259°; Salvad. Boll. Mus. 



Torino, xiv. no. 339, p. 10 ". 

 Urubitinga semiplumbea, Sharpe, Cat. Birds Brit. Mus. i. p. 220 ". 



Supra schistacea unicolor, plumis ad basin albis : subtus alba, striis paucis rhachidalibus ad pectus nigris • 

 alis subtus albis, remigibus ad apicem plumbeo-griseo leviter fasciatis ; cauda nigricante, fascia mediana 

 alba, subtus fascia ad basin notata ; rostro nigro, cera aurantiaca, mandibulae basi et pedibus aurantiaco- 

 flavis, iride flava. Long, tota circa 13-5, alae 7-3, caudae 5-2, tarsi 2-5. (Descr. exempl. ex Veraguas, 

 Panama. Mus. nostr.) 



JvAj. Fuscescentior, subtus cervine vix tincta, remigibus subtus ad apicem magis distincte fasciatis ; cauda 

 fasciis duabus albis brunnescente tinctis transvittata. 



Hah. Honduras, Segovia R. (Townsend ») ; Costa Rica (v. Frantzius^), Yalza (Carmiol), 

 Talamanca {Zeledon \ Gahb «) ; Panama (M'Leannan i), Veraguas (Arce), Forests 

 near the Laguna de Pita, Punta de Sabana {Festa i").— Colombia. 



