42 Faxon, Summer Birds of Berkshire County, Mass. [January 
found during the breeding season in the White Mountains of New 
Hampshire that have not been detected in Berkshire are the 
Blackpoll and Bay-breasted Warblers, and the Philadelphia 
Vireo. The Red-bellied Nuthatch, Brown Creeper, Mourning 
Warbler, Blackburnian Warbler, and Hairy Woodpecker quite 
unexpectedly proved to be much commoner about Graylock than 
I have found them among the White Mountains. Others, on the 
contra1y, are comparatively rare, as the Yellow-bellied Flycatcher,* 
Yellow-rumped Warbler, Golden- crowned Kinglet, and Bick- 
nell’s Thrush. 
From an ornithological point of view the Saddle-Back range 
is but an outlier of the Catskills. On reading Mr. Bicknell’s 
notes on the summer birds of the southern Catskillst I was 
struck with their dppositeness to the Graylock list. I believe the 
only Catskill bird not yet found on Graylock to be the Blackpoll 
Warbler, discovered about the summit of Shde Mountain, the 
highest peak of the Catskills (4205 feet). After finding the 
Bicknell’s Thrush on the summit of Graylock I confess to having 
looked with some confidence for another waif from the Catskills 
in the shape of a Blackpoll Warbler. Though unsuccessful, I 
believe that this bird will yet be found on Graylock by some future 
explorer.{ ‘Che absence of the White-throated Sparrow and 
Nashville Warbler from Mr. Bicknell’s list is surprising. 
Perhaps not even in the Catskills do two distinctly typical 
faunz come into such sharp contact as on the Saddle-Back range 
of northern Berkshire. The top of Graylock is only about 2800 
feet above the Hoosac River at North Adams. Yet within this 
narrow vertical range we pass from a pure Alleghanian fauna 
characterized by such birds as the Bluebird, Wood Thrush, House 
Wren, Brown Thrasher, 4«eHew~\W-arbler, Yellow-breasted Chat, 
Field Sparrow, Towhee, Scarlet Tanager, Baltimore Oriole, and 
Quail to a Canadian assemblage which includes the Hermit, 
Swainson’s, and Bicknell’s Thrushes; the Golden-crowned 
Kinglet, Winter Wren, and Red-bellied Nuthatch; the Black- 
*A pair of Yellow-bellied Flycatchers was 5een on Graylock by Mr. Brewster, 
June 28, 1883. I neither saw nor heard this bird in 1888. 
+A Review of the Summer Birds of a part of the Catskill Mountains, etc. By Eu- 
gene Pintard Bicknell.. Trans. Linn. Soc. N. Wewleptog 2: 
{ “Dendreca striata has been seen in North Adams in August with young so im- 
Prine that they must have been of local origin.” ‘T. M. B[rewer]. Bull. Nuttall 
Orn. Club, III, July, 1878, p. 138. 
