174 ZOOLOGY. 



MOEPHNUS UNICINCTUS, (Temin. 



Falco miicindus, Temm. PI. col. I, 1827. 



Falco Earrisii, AuD. Orn. Biog. V, 1839, 30. 



Pohjhorus tceniurus, Tschudi, Wiegm. Arcliiv. X, 1844, 263. 



Buteo unicinctus, (Temm.) Gat, Fauna Cliilena, Aves, 216. 



VuLG. Bed-winged Hawk. Peuco. 



FiGUEES. — Temm. PL col. 313. 



" Ato. B. of Am. PI. 392; oct. ed. I, PI. 5. 



" TscHUDi, Fauna Peruana, Orn. PI. 1. 



Of tliis fine species, which is of common occurrence in Chile, Peru, and other coimtries of 

 western South America, and in Mexico, and of interest to the student of North America from 

 the fact that it has been met with also in Texas and Louisiana, numerous specimens of adults 

 and young birds are in the collection. The adult plumage is well represented in the plates of 

 Temminck and Audubon, as cited above. 



The young bird presents very considerable differences from the adult, though in all the spe- 

 cimens that we have seen preserving more or less of the fine rufous of the large patch on the 

 shoiilder or wing-coverts. The inferior parts of the body, instead of being of a clear and uni- 

 form dark brown, are strijied longitudinally with dark brown and yellowish white, every feather 

 having a central stripe of the former and edged with the latter. In some specimens there are 

 transverse stripes of white on the abdomen. The plumage of the upper parts is more or less 

 edged with rufous. 



In Mexico and Texas this bird is partial to the neighborhood of rivers, and is dull and slug- 

 gish in its general habits. 



MILVAGO CHIMANGO, (VieUl.) 



Polyhorus cJiimango, Vieill. Nouv. Diet. V, 1816, 260. 

 Aquila pezopora, Meyen, Nov. Acta XVI, Supp. 1834, 62. 

 Caracara chimango, (Vieill.) Gay, Fauna Chilena, Aves, 211. 

 VuLG. Tiuque. 

 FiGUEES. — Gray, Genera of Birds I, PL v. 



" Nov. Acta Acad. Breslau XVI, Supp. PL vi. 



Very abundant in Chile and other countries of western South America. 



Lieutenant Gilliss observes: "Associated with, and has the same general, though much more 

 sluggish habits than the Traro {Polyhorus tJiarus.) In Chile it may he found on all the plains 

 west of the Andes. At times it will scarcely get out of the road for a horseman." 



PONTO^TUS MELANOLEUCUS, (VieiU.) 



Spizcetus melanoleucus, Vieill. Nouv. Diet. XXXII, 1818, 57. 

 Fcdco aquia, Temm. PL col. I, (not paged.) 



Pontocetus melanoleucus, (Gray,) Gay, Fauna Chilena, Aves, 221. 

 VuLG. Aguila. 



Figure. — Temm. PL col. I, PL cccii. 

 Kepresented as rare, and inhabiting the mountains. 



