ORNITHOLOGICAL CLUB. 
37 
tions of the lower surface immaculate, Axillars immaculate pure white ; 
lining of the wing pale cream-color, with longitudinal tear-shaped mark- 
ings or streaks of rusty hrown ; under primary coverts with a large patch 
of grayish-brown, formed by the terminal half or more of each feather be- 
ing of this color ; inner webs of the primaries immaculate white anterior 
to their 'emargination. Wing, 15.70 ; tail, 9.00. 
This specimen presents a very close general resemblance to 
lighter colored examples of the young of B. horealis^ the only obvi- 
ous difference being the cluster of spots on the jugulum (which in® 
horealis is plain white), the obsolete character of the bars on the 
tail, and the more slender tarsi. 
Dark Phase (No. 9,689, Europe). — Prevailing color clove-brown, or 
sooty grayish-brown, this entirely unbroken on the upper surface, but be- 
neath slightly variegated with very narrow whitish streaks on the cheeks 
and throat, irregular bars and spots of the same on the abdomen ; tibial 
feathers wdth rusty tips ; crissum grayish- w^hite wdth brownish spots and 
bars ; white of under surface of primaries broken by a confused sprinkling 
or mottling of grayish ; lining of the wing sooty-brown, irregularly spotted 
with buff and rufous. Tail grayish-brown, considerably lighter than the 
wings, narrowly tipped with dirty whitish, and crossed by narrow bands of 
darker brown, the last of which is much the widest (about 1.00 in breadth), 
the others decreasing in distinctness toward the base. Darker bars on the 
reniiges almost entirely obliterated. Wing, 16.40 ; tail, 9.00. 
This example is almost identical in coloration with the dark 
phase of Buteo swainson%^ the only obvious difference being the 
white bars and spots on the abdomen. 
Young Male. 
Light Phase, Albinescent ? (No. 56,104, Germany). — Prevailing color 
pure white ; head, neck, and lower parts immaculate, excejot a few narrow 
streaks on the forehead and below the auriculars, a few scattered streaks 
on the side of the breast, and a slight spotting on the sides ; occiput and 
nape more distinctly streaked. Lesser wing-coverts almost immaculate 
pure white, and middle coverts so broadly bordered with white that this 
color prevails ; greater coverts tipped with white. Back dark brown, 
the feathers narrowly bordered with white ; scapulars with broader 
white margins. Entire rump and upper tail-coverts immaculate creamy 
white. Remiges and rectrices as usual, but the middle pair of the latter 
with their inner webs buffy white, with broken bars and spots of grayish- 
brown. Wing, 15.50 ; tail, 9.75. 
* See Pr. Ac. Nat. Sci. Philad., March 30, 1875, p. 115. 
