DR. J. J. KAUP’S MONOGRAPH OF THE STRIGIDA. 227 
tinged with rusty-yellow. The margin of the shoulder-covert on the outer web white, 
with rusty-yellow margin, and black-spotted or black margin-end. Large white spots 
on the exterior web of the smaller feathers of the wing. The first wing-feather with 
seven rusty-yellow spots on the outer web; on the following feathers the spots are 
more white, and only near the shaft rufous. The black, grey-pointed tail with five 
lighter zigzag bands. The lower parts white, with fine-pointed, zigzag black lines, 
near the broader shaft-stripes tinged rufous. Under tail-coverts with long blackish shaft- 
stripes and spots. Tarsus thick-feathered and fine black-spotted. 
On the smaller specimen the rufous colour predominates ; the feather-horns are not 
developed ; on the under parts the cross lines are in very small number. I think it is a 
young male. 
Dimens.—Head 37, bill from the gape 15, wing 130, tail 66, tarsus 24, middle toe 
without nail 14 mm. 
The following species from America are so intimately connected, that we can discover 
the distinct character of each only by a close scrutiny. It is certain that they are 
only subspecies from one and the same type. 
10. Scors tricuorsis, Wag]. 
Isis, 1832, p. 276. 
Diagn —Toes with bristle-feathers. 
Descr.—This species is a little smaller than S. brasiliensis, but it has the bristle-feathers 
of the lorum over the cere longer. The drawing is darker and not so elegant as that of 
S. brasiliensis. ‘The series of feathers on the margin of the shoulder-coverts is white, the 
outer webs with black margins and broad point, the inner webs with zigzag black 
lines. The outer webs of the hand-wings have seven irregularly spotted bands, nearly 
white in the middle. On the under side the bands nearer the end are not so clear. 
The arm-wings have seven regular rusty-yellow bands, of which the two near the end 
are more grey and dark spotted. On the exterior side are seen only five cross-bands. 
The breast is darker-coloured, because the shaft-stripes and cross lines are broader. The 
under tail-covert white, with a black and reddish arrow-like figure on the point. The tail 
grey-brown, with from five to six bands, which are reduced on the middle feathers to little 
spots of a rusty-yellow. The face is white, with one or two black bands or spots on 
the feathers ; between the eyes and ears are long bristles. The feathers along the 
anterior margin of the ear have a broad black margin. The veil-feathers on the hind 
margin of the ear round the throat are rusty-yellow, with black points and cross lines 
and white spots. The toes covered with thin bristle-feathers as in Athene noctua. 
Head 46, the longest of the bristle-feathers 28, wing 149, tail 69, tarsus 30, middle 
toe 22 mm. long. 
There exists only one specimen, from Mexico, in the Museum of Wiirzburg. By the 
