112 University of California Publications in Zoology. [Vol. 7 



Eight specimens were secured (nos. 9331-9338). Nos. 9331 

 and 9332, are adult males in breeding plumage ; no. 9333 ]\Iitkof 

 Island, August 4, and no. 9336, Taku River, September 10, 

 are in the juvenal plumage purely ; no. 9334, Port Snettisham, 

 August 31, and no. 9337, Taku River, September 4, are in the 

 midst of the post-juvenal molt ; while no. 9335, female, Taku 

 River, September 4, is in the complete first winter plumage, and 

 no. 9338, male, Taku River, September 13, has but a few juvenal 

 feathers left. 



Sialia currucoides (Bechstein). INIountain Bluebird. 



Mountain bluebirds were occasionally met with along the 

 Taku River during September, evidently migrating, and, toward 

 the end of the month, in rapidly increasing numbers. The first 

 were noted on September 8, two birds, one of which was secured. 

 Two more were seen on September 11, and thereafter they were 

 frequently observed, usually passing overhead, sometimes in 

 flocks of twenty or more. Two specimens were secured, nos. 

 9320, 9321, male and female, respectively, both immatures in 

 complete first winter plumage. These two individuals are of 

 noticeably small size, as compared with specimens from more 

 southern localities. They measure as follows : 



This is, I believe, the first time that the species has been 

 reported from the coast district of Alaska, if not from the 

 territory in general. 



