Mr. R. B. Shai'pe’s Catalogue of Accipitres. 239 
B. calurus; but a typical adult B. borealis is figured in Mr. 
Gosse^s f Birds of Jamaica'’ from a specimen which that 
gentleman has kindly informed me “ was shot in Jamaica.” 
The Norwich Museum contains two adult specimens, one 
from Mexico, the other from Guatemala, which so closely 
resemble Mr. Dresser’s adult male from Pennsylvania that I 
cannot do otherwise than refer them to B. borealis ; and the 
same collection contains a still more typical example of the 
same race, which is said to have been obtained in Chili, as 
well as an adult male from Florida, which lived for some 
years in my possession, and which exhibits markings and 
coloration of such a thoroughly intermediate character that I 
feel doubtful whether to consider it an example of B. borealis 
or of B. calurus. 
I may add that the same collection contains unmistakable 
specimens of B. calurus . from Mexico, both normal and 
melanistic, and one of the latter from Central America, 
which I believe was obtained as far south as Panama. 
Mr. Sharpe, in the addenda to his volume, briefly refers at 
p. 458 to the descriptions given in Messrs. Baird, Brewer, 
and Bidgway^s work (vol. iii. pp. 258, 284 & 285) of three 
other races of Buzzard more or less nearly allied to B. borealis , 
and severally designated as Buteo hrideri, Hoopes,” in¬ 
habiting the plains from Minnesota to Texas; ” “ Buteo 
borealis , var. l^ucasanus, Bidgway,” from the “ peninsula of 
Lower California; ” and “ Buteo borealis } var. costaricensis , 
Bidgway,” found in “ Central America and South-western 
Mexico, Costa Bica, Yeragua, and Tres Marias Islands.” 
Of these three forms I have only seen the last, which 
seems to me to be a well-defined race, meriting certainly sub- 
specific, and possibly full specific distinction. An adult B. 
costaricensis in the Norwich Museum from Panama agrees 
with the description of the adult plumage given by Messrs. 
Baird, Brewer, and Bidgway, with the following exceptions, 
which may probably be due to individual variation. The 
feathers of the nape are edged with rufous, and the penulti¬ 
mate scapulars are similarly, but more broadly, edged; the 
lowest scapulars are broadly tipped with fuliginous brown, 
