1922] Sivarth: Birds and Mammals of the Stikine Region 223 



series of specimens taken when these birds were collected (August 

 19-30), would contain a large percentage of immatures, but if such 

 young birds are included in the lot they possessed no features, either 

 of internal anatomy or external coloration that enabled me definitely 

 to recognize them as such. According to Drew (1882, p. 182) the 

 young of this species is appreciably different from the adult in colora- 

 tion, the dark feathers being extensively white-tipped, both above and 

 below. Of the five males, two have extremely faint light colored tips 

 to the feathers of the lower abdomen and on the lower tail coverts. 

 One of the five has the tail very slightly forked, in the others it is 

 deeply indented. Of the twelve females, one is uniformly dark colored ; 

 it has no trace of any whitish tips to the feathers of the lower parts. 

 In the others such markings are present in varying degrees. The dark 

 colored female has a truncate tail, just as do the others. In every 

 individual, both male and female, the sexual organs were clearly visible. 

 They were shrunken in size, as would be expected in adults at that 

 season, but they were never difficult to see, as is so often the ease with 

 young birds. The birds collected had entirely finished the annual 

 molt and were all in the new plumage. 



Chaetura vauxi (J. K. Townsend). Vaux Swift 

 On June 26 a single bird was noted some five miles from Telegraph 

 Creek. At Doch-da-on Creek, the middle of July, a few were seen on 

 several different days. At Flood Glacier, August 3 and 5, several were 

 observed, flying low in the rain that was falling, and all traveling down 

 stream. 



Two specimens were collected (nos. 39811, 39812), an adult male 

 and an adult female, taken at Doch-da-on Creek, on July 16 and 14, 

 respectively. 



Selasphorus rufus (Gmelin). Rufous Hummingbird 

 Seen at every collecting station, but nowhere in abundance. The 

 species was at Telegraph Creek a£t the time of our arrival, May 23 ; 

 at that time it was restricted to the near vicinity of the river, where 

 there were already some flowers in bloom. On the higher slopes the 

 vegetation was not so far advanced, and the hummingbirds were absent. 

 A nest found at Doch-da-on Creek, July 10, was in a clump of large 

 timber, built near the tip of a spruce limb, about five feet from the 

 ground. The outer surface of the structure was well covered with 



