1922] Sivarth: Birds and Mammals of the Stikine Begion 225 



Sayormis sayus yukonensis was described by Bishop (1900b, p. 115) 

 from Glacier, White Pass, Alaska' as a northern form, differing from 

 S. sayus sayus in darker coloration and in certain structural details. 

 The subspecies was denied recognition by the A. 0. U. Committee 

 (1901, p. 312), nor has it been generally recognized since that time. 

 Grinnell (1909ffi, p. 206) uses the name S. s. yukonensis for a specimen 

 from Forty-Mile, Yukon, which is shown to exhibit the characters 

 claimed for the race by Bishop. The young bird (no. 39815) collected 

 by myself differs appreciably from juvenals from the southwest. It is 

 of darker coloration and has much less rufous on the upperparts, thus 

 agreeing with Bishop's {loc. cit.) description of the juvenal plumage 

 of yukonensis. Thus the two northern specimens of Sayornis sayus in 

 this Museum are of a character to justify the recognition of S. s. 

 yukonensis, but the material is so scanty that, rather than formally 

 affix that name to these two individuals, I prefer to let the descrip- 

 tion of their peculiarities rest as evidence for use at some future time 

 when additional material has been acquired. 



Nuttallornis borealis (Swainson). Olive-sided Flycatcher 

 There were a few pairs in the more open wooded country about 

 Telegraph Creek. The birds were extremely shy, not permitting a 

 near approach, and their habit of perching in the tops of tall trees also 

 aided in keeping them out of gun shot. Seen at but the one collecting 

 station. 



Myiochanes richardsoni richardsoni (Swainson) 

 Western Wood Pewee 



Fairly common about Telegraph Creek. First seen on May 27 ; a 

 few days later present in numbers. A female shot at Glenora on July 7 

 had laid part of its set. None seen farther down the river than 

 Glenora, though, as the species is known to occur in summer at some 

 points on the coast of southeastern Alaska (Swarth, 1911, p. 75), it 

 might be expected to range through the entire Stikine Valley. 



The birds were extremely shy. They were partial to more sparsely 

 wooded areas, especially burnt-over tracts, where they perched upon 

 dead trees affording a wide outlook. In such places they could seldom 

 be approached to within a hundred yards. 



Three specimens collected (nos. 39816-39818), one adult male and 

 two adult females. Besides these birds there are in the Museum col- 

 lection, specimens from the coast of southeastern Alaska and from 



