3 o8 



Richmond and Knowlton on Montana Birds. [Oct 



parts than average eastern birds. There appears to be no difference in 

 size. 



104. Parus atricapillus septentrionalis. Long-tailed Chickadee. — 

 Very abundant along the streams in the valleys, travelling about in 

 small troops in the cottonwoods and willows. 



105. Parus gambeli. Mountain Chickadee. — Common in the 

 mountains, and extending down on the foothills as far as coniferous trees 

 occur. The hoarse, drawling note of this bird is easily distinguished 

 from the energetic one of the preceding species. After the middle of 

 September we found them sparingly in the valleys, associating with 

 flocks of the Long-tailed species. 



106. Regulus satrapa olivacea. Western Golden-crowned 

 Kinglet. — Breeds in the mountains. An immature bird just leaving the 

 nestling plumage was secured August 28. The species was quite common 

 in the vicinity of Mystic Lake about the last of September, but no 

 individuals were seen at any time in the valleys. 



107. Regulus calendula. Ruby-crowned Kinglet. — Common 

 during September in the valleys. It was not noted in the mountains. 



108. Turdus ustulatus swainsonii. Olive-backed Thrush. — Several 

 specimens collected are referable to this form. Young birds in first 

 plumage were secured July 27, at Mystic Lake, and August 27, at the 

 north end of Gallatin Valley. 



109. Turdus aonalaschkae auduboni. Audubon's Hermit Thrush. — 

 Several obtained. A young bird in nestling plumage was secured July 27, 

 at Mystic Lake. An adult was taken September 11, at an elevation of 

 8500 feet. 



no. Merula migratoria propinqua. Western Robin. — Common in 

 the valleys, and also noted in some numbers in the mountains. 



in. Sialia arctica. Mountain Bluebird. — Common ; breeds. Found 

 migrating in small flocks during September. 



Too late for insertion in its proper place in the list, we find 

 that an immature specimen of the Rough-winged Swallow 

 {Stelgidopteryx serripennis) was collected by us near Hillsdale, 

 in Gallatin Valley, August 22, 1S88. The bird was doubtless 

 raised in the vicinity. This appears to be somewhat north of its 

 usual range. 



