1922] Swarth: Birds and Mammals of the Stikine Region 253 



plumage. This was done, not on the ground, but up in the shrubbery ; 

 the tail was held stiffly spread and pointed straight downward, while 

 the bird hopped from branch to branch about the female. 



Young birds, just out of the nest, were several times found infested 

 with parasitic larvae. The first bird in this condition was collected 

 near Telegraph Creek, June 15. On picking it up after shooting it, 

 a maggot dropped to the ground, and I noticed then a bare spot on the 

 bird's head with a small hole where the larva had been attached. Upon 

 skinning it, two more larvae were found, between the skin and skull, 

 surrounded by a mass of yellow serum. Later on other young juncos 

 were taken similarly afflicted, with the larvae always on the top of the 

 head. The larvae were white in color, seven millimeters long and about 

 three in diameter. 



Junco oreganus oreganus (J. K. Townsend). Oregon Junco 



Twenty^seven specimens referable to this subspecies were collected 

 at three different points, as follows : Flood Glacier, two adult females, 

 four Juvenal males, three juvenal females; Great Glacier, one adult 

 male, one adult female, seven juvenal males, two juvenal females, one 

 juvenal, sex not ascertained; Sergief Island, three males and three 

 females, all immature birds in freshly acquired first winter plumage. 

 (Mus. Vert. Zool. nos. 39989, 39991, 39992, 39994^39997, 40000-40019). 



Specimens of oreganus in juvenal plumage from the coast of Alaska, 

 compared with the same stage of connectens from the upper Stikine 

 Valley, are much more huffy beneath and more reddish dorsally ; the 

 red dorsal patch of oreganus is clearly indicated in the young. Young 

 oreganus is a ruddy appearing bird, young connectens, grayish. "While 

 these differences are apparent in fresh plumage, they are not so 

 obvious when the feathers become worn. The young birds from Flood 

 Glacier, at about the dividing line between the ranges of oreganus and 

 connectens, are ready to discard the juvenal plumage, and in some 

 specimens it is not possible to tell to which species they belong. How- 

 ever, those which do show specific peculiarities are apparently oreganus. 

 Two young males, beginning the post-juvenal molt, are acquiring 

 pink sides, and in one of them the new feathers on the head are dis- 

 tinctly blacker than in connectens. Young females, undeterminable 

 in appearance, were taken in company with an adult female oreganus. 

 For these several reasons I have assigned the entire series of streaked 

 plumaged young from Flood Glacier to oreganus. 



