62 FALCONIDS. 
Hab. Norru Amentca generally 2° 2 42,—Mexico ®, Cuihuichupa in Sonora (Robinette *°), 
Hermosillo (Ferrari-Perez), Guaymas (Belding 7"), Mazatlan (Grayson **), Ciudad 
in Durango (Forrer), Zacatecas, Bolafios, Zapotlan, Sierra Madre de Nayarit, 
Volcan de Colima, Plains of Colima and San Luis Potosi (W. B. Richardson), 
Hacienda de San Marcos, Jalisco (W. Lloyd), Guanajuato (Dugés ? **), Michoacan 
(Sumichrast 16), Valley of Mexico (Herrera \" 4"), Coapa, Tlalpam (Ferrari-Perez), 
Vera Cruz, Jalapa (de Oca®, Ferrari-Perez**), Orizaba (Sumichrast 16 °°, Ferrari- 
Perez), Talea, Oaxaca (Boucard'), Cacoprieto, Tehuantepec city ( Suméehrast ), 
Merida in Yucatan (Schott *+); Brrrisn Honpuras, Southern Pine Ridge (Blanc- 
aneaux); GUATEMALA (Skinner ®), Duefias, San Gerénimo (0. 8. & F. D. G. * 71), San 
Martin, Quezaltenango (W. B. Richardson); Nicaragua, Volcan de Chinandega, 
Matagalpa (W. B. Richardson), San Juan del Sur (Nutting *°); Costa Rica 
(v. Frantzius®!35), San José (Van Patten “4, Carmiol**), Los Tabacales (Zeledon 33), 
Cartago, San Isidro, Santa Maria (Underwood), La Palma, Gulf of Nicoya 
(Nutting #4); Panama, Volcan de Chiriqui, Chitra, Calobre (Arcé'*), Isthmus 
of Panama (IJ-Leannan "),—Cusa 2°; Jamaica’; Porro Rico; Harv *; 
BanaMas 2°; PataGconia 14. 
In Central America several of the forms of Red-tailed Buzzards recognized as 
subspecies by the American naturalists occur. 
After a careful examination of the large series of specimens in the British Museum 
we have come to the conclusion that there are several races of B. borealis, easily 
recognizable in their breeding-quarters, but difficult to distinguish when crowded 
together in their winter homes. The young birds of the various races are quite 
indistinguishable: much study will be necessary before we can appreciate the 
difference between the resident northern races and merely immigrant birds. 
The following races of Red-tailed Buzzards are generally admitted by the American 
ornithologists :— 
Buteo borealis. This is the species of the Eastern and Central United States, and is 
also the form which nests in Canada and the northern territories of British North 
America. The specimens obtained during the Boundary Commission on the 49th 
parallel apparently belong to this species, but as we have only young birds before 
us, we have been unable with certainty to determine their identity. We notice 
that the Red-tailed Buzzard of Montana has recently been referred to B. calurus, 
but we are inclined to consider the specimen in the British Museum from that State 
to be true B. borealis. 
In Texas, whence we have received examples of at least three forms, we have 
seen only four which we could assign to the true B. borealis. From Tarpon 
Springs in Florida we have examined a single specimen also referable to this race, 
which breeds in Jamaica and visits other West Indian islands on migration. We are 
