Vol. xxxix. | 76 
Mr. W. Scuarer exhibited and described a new subspecies 
of Leucopternis from Central America under the name 
Leucopternis ghiesbreghti costaricensis, subsp. nov. 
Resembling L. g. ghiesbreghti, but having the inner 
primaries and the secondaries dusky black crossed by narrow 
bars of dead black; the tips and inner edges of these feathers. 
are white, but the black on the wing makes these birds 
conspicuously different from the typical form, in which the 
inner primaries and secondaries are pure white. 
Type. A male collected at Carillo, Costa Rica, by C. F. 
Underwood, 1 Nov. 1898, for Messrs. Salvin & Godman, by 
whom it was presented to the British Museum, B.M. Reg. 
Nor 99.12 1.17; 
L. ghiesbreghti was described by Debus (Esq. Zool. 1848, 
pl. i.) from au example obtained at the Hacienda de Mirador, 
near Vera Cruz, in Mexico. The British Museum contains 
examples of the typical race from the following localities :— _ 
Mexico, Atoyac in Vera Cruz and Chimalpa in Oaxaca. 
Guatemala, Choctum in Vera Paz. British Honduras and 
Honduras. 
The new form is represented by a good series of examples 
from Nicaragua, Costa Rica, and Panama, while two 
specimens from the Pacific slope of Guatemala—Medio 
Monte (Salvin) and Savana Grande (Salvin & Godman), are 
distinctly intermediate. 4 
The late Mr. J. H. Gurney (‘ Ibis,’ 1876, pp. 470-1) had 
already noticed this difference in the Mexican and Central 
American forms of L. ghiesbreghti and had put it down to age, 
assuming that the white-winged Mexican form was the ad .") 
and the black-winged form the young bird, but I do 0 
think this view could possibly be upheld when the fine series 
now in the Museum is examined. 
Mr. Richmond who has most kindly examined the examples 
of L. ghiesbreghti in the United States National Museum 
confirms my belief in the existence of two distinct forms of 
this very beautiful Buzzard. | 
