148 Tur Wirson BuLLerrn—Nos. 76-77. 
buff white with obovate spots of wood brown; lining of 
wings buff imperfectly banded with russet. Wing—10.50 
(266).  Tail—6.25 (159). Tarsus—2.16 (55). Middle 
Cat6g (17). Hind claw—.78 (20). Bill from cere— 
80 (20). Cere—44 (11). A juvenile male taken at Hol 
guin, Santiago, Cuba, Aug. 5, 1904, is not at all different 
from my local birds of the same age, except the dark upper 
plumage covers the white bases more perfectly, the abdomen 
is almost spotless and the thighs have heavier obovate mark- 
ings. The measurements exceed that of my Salema Naas 
example of perhaps six weeks less growth, in all but tarsi 
and talons, which are less. The Cuban differs from the Con- 
tinental bird in being slightly smaller, lacking the grayish 
phase of upper plumage and also seems to be comparatively 
heavier marked on thighs and lining of wings, our typical 
form frequently has the wing lining immaculate. On the 
other hand a specimen from Moose Factory, Hudson Bay, is 
as heavily marked on the thighs as the bird from San Diego, 
de los Banos, Cuba, in the National Museum; though as 
J. H. Riley points out to me, the latter seems to have fewer 
bars. I have not a large suite of skins to prove the differ- 
ence between the mainland and island birds, between which 
no communication exists apparently. To justify recognition 
of a Cuban form the difference would have te be fairly con- 
stant. It must be remembered, however, that of the St. Vin- 
cent and Dominican birds examined by Clark and Verrill, 
upon which they based their forms, every one was taken in 
September and October, presumably at the time of the dark- 
est phase; and the single adult from Antigua upon which Ri- 
ley bases his form, was taken in May when pale, faded out 
specimens might reasonably be looked for in this species. 
Nevertheless all appear worthy of separation, as the Cuban 
and Porto Rican bird will eventually, and for which I offer 
Buteo platypterus cubanensis. Sub-spec. nov. 
The average measurements of a series of 37 specimens 
taken on the mainland, follows: 
