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Valley, California, and was the only example known up to 
the time when Messrs. Baird, Brewer, and Ridgway drew up 
the description given of it in the third volume of their work, 
which is very full, and is accompanied by a woodcut of the 
bird itself, and also by one of the foot and leg in detail. This 
account contains the following remark, which it may be use- 
ful to transcribe :—‘‘ The nearest ally of this species is the 
B. ferox of the Palearctic region, which has exactly the size 
and proportions of the present bird, and, in certain stages, a 
very similar plumage.” | 
Since the article above referred to was written, asecond 
specimen of this Buzzard has been obtained: this example 
was procured from Denver, in Colorado; and Mr. Ridgway, 
who has had the goodness to inform me of its occurrence, 
adds that it agrees closely with the type specimen. 
Before proceeding to the consideration of the Buzzards of 
the Old World, I am desirous to recur to an obscure South- 
American form, to which I have already briefly alluded 
(anted, p. 69), Buteo unicolor of D’Orbigny, described by that 
traveller at page 109 of his ‘Oiseaux de Amérique Méri- 
dionale.’ 
The type specimen, which appears to have been the only 
one obtained, was met with by D’Orbigny near Palca, in Bo- 
livia, and is still preserved in the Museum of the Jardin des 
Plantes at Paris, where it has been recently examined by Mr. 
Salvin, who kindly permits me to furnish my readers with 
the following notes which he has made respecting it :— 
“ Measurements: wing 145 inches, tail 8, tarsus 2:5, mid- 
dle toe s. u. 1°3. 
“The whole plumage is sooty brown; the forehead on 
either side has a small white spot; the tail is barred with 
fourteen narrow black bars on a brown ground ; these bars 
were counted on the upper side of the middle rectrices, and 
the whole fourteen are exposed between the end of.the upper 
coverts and the tip of the tail; the upper tail-coverts and the 
uropygium were hardly paler than the rest of the back.” 
T may supplement the above by the following extract from 
D’Orbigny’s original description :—“ 'Toutes les parties su- 



