150 THE Witson BULLETIN—NOsS. 76-77. 
Buteo platypterus rivierei— ‘The series from Dominica 
are darker than specimens from St. Vincent, more sooty 
above, more heavily marked below, and with the bars darker. 
In size there is very little difference between St. Vincent and 
Dominica specimens. This is probably a fairly well-marked 
insular form, depending upon its darker coloration for 
recognition.”—Riley. The irides “are white or pale straw at 
all ages and in both sexes *“—Verrill. Ober, however, gives 
it as umber—Lawrence. 
Of Buteo platypterus imsulicola the describer states: “ The 
adult is much lighter and smaller than B. p. antillarum, and 
the bars below are narrower and less sharply defined. It 
is certainly a well-marked insular race, not coming into close 
contact with any of its relatives on the north er south.”— 
Riley. 
3ULTEO PLATYPTERUS PLATYPTERUS. 
Natal Down, Young, One Day Old—Well covered with 
the palest possible yellowish-white down, bill blue-black, cere 
very pale yellow, edge of mouth, feet and tarsi flesh color, 
irides blue-black. Examples: Berwyn, Pa., June 12, 1901; 
Daylestord, Pa., June 3, 1906. 
Juvenile First Year, Male—Upper parts deep rich brown, 
almost black; head, hind neck and back edged with rufous, 
the basal portion being pure white; primaries and secondaries 
fading on the inner webs to white and barred with deep 
brown, tipped with gray; tail clove brown fading on inner 
webs to white, with six bars of deep brown about one- 
quarter of an inch wide, except terminal bar, which is from 
half to three-quarters of an inch wide and narrowly tipped 
with ashy white; upper tail coverts white tinged with ru- 
fous on outer vane and imperfectly barred with deep brown. 
Beneath impure cream buff with guttate spots of fuscous 
clustering on breast, sides and flanks; abdomen and under 
tail coverts immaculate; tibee vermiculate near body, acicu- 
lar near heel; throat with a few pencilings of deep brown; in- 
cipient malar stripe dusky brown; under primary coverts 
