1926] Swarth: Birds and Mammals from the Atlin Region 113 



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 subspeeias prior to this was, I believe, from the 

 upper Skeena Valley, British Columbia (Swarth, 1924, p. 337). 



That Falco calumlarius columhwrius also occurs 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 cohimiarius. 



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 haliaetus 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 subarcticus. 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 



