334 University of California Publications in Zoology [Vol. 24 



northern bird are rather brilliantly ruddy are of more restricted size 

 and of a dull tone, and there is extension of black and grayish areas. 

 It seems likely tha.t these two birds represent two different subspecies. 



There are no adult females of Lagopus rupestris dixoni available, 

 and but two summer males (uos. 371, 372, Port Frederick, Chiehagof 

 Island, July 30, 1907). Two summer males from Atlin, British 

 Columbia, loaned by the Provincial Museum, Victoria (no. 2566, June 

 26, 1914; no. 2589, July 1, 1914), are quite unlike dixoni, sufficiently 

 so to make it seem improbable that dixoni is a southern race of general 

 occurrence on the mainland as well as on the Alaskan islands. 



The Nine-mile Mountain female possesses one feature worthy of 

 comment. The six outer tail feathers on each side are white basally, 

 the total white area covering more than half the tail. On the inner 

 rectrices the white extends over about the basal three-fourths; it 

 decreases on the inner web of the outer feathers, though extending far 

 toward the tip on the outer web (see fig. A). This is exactly the 

 character ascribed to Lagopus hyperboreas Simdevall, of Spitzbergen 

 (see Dresser, 1871, p. 179, col. pi. no. 482, text fig.; Ogilvie-Grant, 

 1893, p. 51). The -white tail was not peculiar to the one specimen 

 collected, for other females were seen on Nine-mile Mountain which 

 had the same marking. It was conspicuous in flight. No male was 

 noted with this character; in fact no male rupestris was positively 

 recognized. 



The two chicks collected are readily distinguished from young 

 leucurus by their generally browner color. Young leucurus is dis- 

 tinctly gray. The young of lagopus is more ruddy throughout. 



• 



Lagopus leucurus leuctirus (Swainson). White-tailed Ptarmigan 



Found only on the eastern ridge of Nine-mile Mountain. Four 

 specimens collected, two adiilt females and two chicks (nos. 42036- 

 42039). The young birds, taken on July 26 and August 1, respec- 

 tively, have some natal down about the head; otherwise they are in 

 Juvenal plumage. Three broods of white-tailed ptarmigan were seen, 

 one of two chicks, one of three, and one of twelve. 



Circus hudsonius (Linnaeus). Marsh Hawk 



An adult male was seen repeatedly during parts of June and July 

 about the same locality in Kispiox Valley. At the end of the summer 

 the first migrant was seen September 10, and a few others were noted 

 at later dates. 



