1922] Swarth: Birds and Mammals of the Stikine Region 293 



Wilsonia pusilla pileolata (Pallas). Pileolated Warbler 

 In our experience a rare species in the upper Stikine Valley. A 

 few were seen from May 29 to June 1, between Telegraph Creek and 

 the Junction, but these appeared to be migrants. None seemed to 

 be nesting. Next encountered at Flood Glacier, where, on August 4, 

 a bird was. caught in a mouse trap. The fall migration was then 

 setting in, and a few days later, at Great Glacier, pileolated warblers 

 were noted from time to time with other migrating warblers. At 

 Sergief Island, the latter part of August they were seen almost daily, 

 the last on September 1. 



Six specimens were collected (nos. 40208-40213), two adult males 

 and one adult female from the vicinity of Telegraph Creek, an im- 

 mature (sex not determined) from Flood Glacier, and an immature 

 male and immature female from Great Glacier. These specimens, in 

 my opinion, are all referable to the subspecies pileolata. The three 

 Telegraph Creek adults are slightly darker and duUer colored through- 

 out than coastal birds, and to that extent, presumably, lean toward 

 pusilla, but they are not so dark colored as eastern specimens of that 

 subspecies. In measurements they do not differ from coastal pileolata. 

 "With the material at hand it is not possil^le to tell whether the im- 

 matures collected in August at Flood Glacier and Great Glacier are 

 migrants from the interior or from the coast. They are not appreciably 

 different from immature pileolata from Alaskan coastal points. 



Setophaga ruticilla (Linnaeus). American Redstart 

 First encountered near Telegraph Creek on June 11. From the 

 actions of the birds seen on that date and the number that were 

 observed, it seemed as though they might have arrived some time pre- 

 viously, but the same ground had been traversed two days before 

 without any redstarts being seen or heard. From this time on the song 

 of this species was heard by us practically everywhere we went in the 

 poplar woods of the lowlands. Males in the plumage of the female, 

 supposed to be birds of the previous year, sang just as did those in the 

 brilliant black and orange livery. That the dull feathered males were 

 breeding was shown in one instance in the capture of a mated pair, 

 evidently preparing to nest. This was on June 15. The male was 

 just like the female save for a few black feathers scattered through 

 the body plumage. The female was almost ready to lay. 



