380 



BULLETIN OF THE 



however, has been generally considered as the western representative of 

 B. linealus, but it differs from the latter only in being brighter colored, or 

 in having the ferruginous of the under parts more intense. In this it 

 resembles the western representatives of the B. borealis, Archibuleo lago- 

 pus, Accipiter fuscus, Circus cyaneus, Falco peregrinus, and other species 

 of this family, the western specimens of which are ordinarily more rufous 

 than the eastern, though in only a part of them have the eastern and 

 western races as yet been separated as distinct species. 



The considerable difference in size between specimens of this species 

 from New England and Florida has led to the supposition that the former 

 may be specifically distinct from the latter, or at least that they form well- 

 marked varieties.* The following measurements, however, show that 

 specimens occur in Florida, in winter at least, nearly as large as average- 

 sized New England specimens. But these may have been merely 

 winter visitors, since two of the, three specimens taken in February on 

 the St. John's River are larger than any of the others, all of which were 

 taken later in the season. Those taken by Dr. Wiirdemann at Cape 

 Florida and Indian Key are also smaller than those from the St. John's 

 River. 



Measurements of Florida Specimens of Buteo lineatus. 



88.t Buteo pennsylvanicus Bonaparte. Broad-winged Hawk. 



Falco pennsylvanicus Wilson, Am. Orn., VI, 22, 1812. 



Buteo pennsylvanicus Bonap., Geog. and Comp. List, 3, 1838. — Audubon, 



Syn., 6, 1839. — Cassin, Illust. Birds Cal., Texas, etc., 100, 1854. — Cassin, 



Baird's Birds N. Am., 29, 1858. 

 Falco latissimus Wilson, Am. Orn., VII, 22, 1812. (Later published copies.)! 



* See Prof. A. E. Verrill in Proc. Essex Institute, Vol. Ill, p. 141.1S62. 



t Smithson. Inst., No. (Copied from f!t.o«>;n | n Baird's Birds of North America, 

 p. 28.) 



J Concerning the names F. pennsylvanicus and F. latissimus given by Wilson to this 

 6pecies, sec Air. Cassin's remarks, Illust. Birds of Cal., Texas, etc., p. 101. 



