238 Mr. J. H. Gurney's Notes on 
that, though in B. calurus the tibiae are never immaculate, 
the converse does not always hold good in the case of B. 
borealis. The following instances in point may serve to 
illustrate this fact:—An adult male from Pennsylvania in the 
collection of Mr. Dresser, which in all other respects is a 
thoroughly typical B. borealis , has the entire hinder surface 
of the thighs (and to a certain extent the front also) di¬ 
stinctly barred with transverse fulvous stripes. An immature 
specimen in the same collection, also from Pennsylvania, has 
the tibiae strongly marked with transverse bars of brown, 
which are broader than in the adult specimen previously 
mentioned, but considerably further apart from each other. 
Two other immature specimens in Mr. Dresser's collection, 
both from New Brunswick, also have the tibiae barred with 
brown, but less strongly than in the young bird from Penn¬ 
sylvania; in one of these specimens many of the markings 
assume the form of triangular spots rather than of bars. 
The last-named specimen is very similar to two immature 
Canadian examples in the Norwich Museum, one of which 
was obtained near Quebec, and both of which have the tibiae 
similarly marked. 
With regard to the geographical range of the two races, 
Mr. Sharpe gives that of B. borealis as the “ Eastern States of 
North America, extending to Cuba, Jamaica, and the West 
Indies," and that of B. calurus as “Western North America, 
throughout Central America, and ranging in winter to the 
southernmost parts of the South American continent." 
Messrs. Baird, Brewer, and Ridgway define the respective 
habitats of these Buzzards somewhat differently. Under the 
head of B. borealis they say, “ Hab. Eastern North America, 
not in the West Indies, nor west of the Missouri. Localities. 
(?) Bahamas (Bryant, Pr. Bost. Soc. 1867, p. 64). and 
under the head of B. calurus (p. 286), “Hab. Western region 
of North America from the Rocky Mountains to the Pacific, 
south into Mexico, West Indies (Jamaica and Cuba)." 
The only West-Indian specimen which I have had an 
opportunity of examining is one from Hayti in the Norwich 
Museum, an immature bird, which I am disposed to refer to 
