1926] Swarth: Birds and Mammals from the Atlin Region ites

The breeding range of suckleyi is, I believe, unknown, but it has
been assumed to be along the coast and farther south than is indicated
by the occurrence of these migrants in the Atlin region. The northern-
most record of the subspecies prior to this was, I believe, from the
upper Skeena Valley, British Columbia (Swarth, 1924, p. 337).

That Falco columbarius columbarius also oceurs at Atlin is proved
by a specimen in the Provincial Museum, Victoria, collected there
August 13, 1914 (Anderson, 1915, p. 12). I have seen this bird and it
is unquestionably of the subspecies columbarius.

Cerchneis sparveria sparveria (Linnaeus). Sparrow Hawk

Fairly common and of rather general distribution. The sparrow
hawk occurs in the more open country in the lowlands, and also above
timber line; it usually avoids the denser woods. Present at Carcross
when we arrived the latter part of May. The last bird I saw was at
Gladys Lake, September 8, but the species has been recorded from
Atlin as late as September 18 (Kermode and Anderson, 1914, p. 19).

Pandion haliaétus carolinensis (Gmelin). Osprey

Seen about Lake Atlin at rare intervals during the summer, and
at Gladys Lake, September 7. Has been found nesting near Atlin
(Anderson, 1915, p. 12).

Bubo virginianus subarcticus Hoy. Arctic Horned Owl

Bubo virginianus lagophonus Oberholser. Ruddy Horned Owl

Six horned owls were collected as follows: an adult male, June 5
(no. 44738) ; an adult male, and male and female in post-juvenal molt,
July 3 (nos. 44739-44741); adult male in annual molt, August 4
(no. 44742); adult male, August 25 (no. 44743). These birds are
puzzling in appearance, but, although I cannot assume to have inter-
preted their peculiarities beyond possibility of mistake, they seem to
me to demonstrate with fair certainty that the breeding horned owl
of this section is the subspecies swbarcticus. I had expected to find
lagophonus in the Atlin region, as the ascribed range of that subspecies
includes this section, but four of the six specimens cannot possibly
be considered as of that race. Nos. 44739, 44740, 44741, 44743, are
extremely gray-colored birds, with perhaps the minimum of rufous
in their coloration that is seen in horned owls from any section.
No. 44743 has legs and toes gray-barred; in the other three, those parts