RAP TO RES. 93 



Dimensions. — Total length of skin, from tip of bill to end of tail, 

 about nineteen inches; wing fifteen inches; tail nine and a half inches; 

 tarsus about three and one-fourth inches. 



Colors. — -Throat brownish-black, unspotted. Entire plumage of the 

 head above, back, rump, wings, and coverts deep sepia-brown ; many 

 of the feathers tipped and edged with reddish-ferruginous, especially 

 on the wing-coverts and rump, and almost predominating on the latter. 

 Secondaries and some of the primaries tipped with pale reddish-white, 

 and distinctly marked with several transverse bars of a deeper shade 

 of the same brown. Outer primaries brownish-black, with their inter- 

 nal webs more or less marked with white, very conspicuous upon view- 

 ing the inferior surface of the wing. 



Under parts pale reddish-white; every feather longitudinally marked 

 with brownish-black ; tinged with rufous on the flanks and abdomen, 

 and with that color predominating on the tibia. Tail above cinereous, 

 becoming white on the inner edges of the feathers, and every feather 

 crossed with many narrow bands of brown ; under surface of the tail 

 white. 



Hab.' — South America, Patagonia, Chili. Specimen in Nat. Mus. 

 Washington. 



This buzzard appears to be extensively diffused, the collection of the 

 Expedition containing specimens from Patagonia and Chili. They are 

 very similar to each other in color and other characters, and are con- 

 stantly characterized by the black throat, as described by Mr. Gould, 

 and as represented in our plate. 



Although we think it quite probable that this bird assumes a very 

 different plumage when adult, and that it may be the young of a pre- 

 viously known species, yet we have not succeeded in so referring it with 

 any degree of satishtction. It has been regarded as the young of Bateo 

 enjilironotus (King), which is Bateo tricolor, D'Orbigny, and is cited as 

 a synonyme in Gray's Genera of Birds, I, p. 12, Bonaparte's Conspectus 

 Avium, p. 17, and in Kaup's Arrangement of the Falconida3. 



We have had ample opportunities of examining specimens of that 

 species in various stages of plumage, in the collection of the Philadel- 

 phia Academy, and of comparing them with those of the present bird, 

 in the collection of the Expedition, but have not been able to trace a 



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