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, Avhich 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 fidvous stripes. An immature 

 specimen in the same collection, also from Pennsylvania, has 

 the tibiae strongly marked with transverse bars of brown, 

 which arc 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 immatui'e 

 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 Kidgway 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 



