1l4 University of California Publications in Zoology [Vou 30

are mostly white. Altogether, the black-and-white appearance of these
owls is in striking contrast to the tawny-colored lagophonus, as repre-
sented by a series from the upper Skeena Valley, British Columbia.
Nos. 44739 and 44740 are two juvenals, taken with the male parent
(no. 44741). The two young are quite unlike, one being much darker
than the other; the pale colored bird is the more rufescent of the two.

Two specimens were collected that are like lagophonus from the
Skeena Valley. One of these (no. 44738, adult male, June 5) with
hardly a doubt was not a breeding bird. Of the second (no. 44742,
adult male, August 4) it cannot be said with any certainty whether
or not it had bred in the region. These two individuals may be, as
their appearance indicates, examples of lagophonus that had wandered
beyond the usual confines of that race. The breeding birds in the
series are most nearly like specimens of swbarcticus from the Yukon
region, a short distance to the northward. The Atlin region forms the
southern boundary of the Yukon drainage, and it is to be expected
that the distribution of some Yukon species should be co-extensive
with this drainage system.

Horned Owls were fairly common in the Atlin region; hooting could
be heard almost every night. One bird was seen at Lake Teslin,
September 12. Of the six horned owls collected, four had their
stomachs filled with remains of rabbits. Those of the other two were
empty.

Surnia ulula caparoch (Miiller). Hawk Owl

On May 29 a hawk owl was found in a tract of spruce timber at the
northern base of Monarch Mountain, and as the bird was seen sub-
sequently at the same place on several occasions, it may have been
nesting there. This was the only one seen until the end of the summer.
On August 19 Brooks shot a young bird, in first winter plumage
throughout save for remnants of down about the head, and from then
on others were seen at frequent intervals. ‘

The three birds collected, two by Brooks, the other by myself
(no. 44744, male, September 19), are alike and are extremely dark
colored. Compared with a large series from northern Alaska, the
Atlin specimens are more slaty above and less reddish below. These
color differences cannot be explained as illustrating seasonal change
or sexual or age variation, but neither can they with any certainty be
correlated with any geographic area.

One hawk owl had in its stomach the remains of a Peromyscus.