5 
res 
162 TOWNSEND, Labrador Chickadee in Migration. 
I have, on several occasions, placed a series of specimens of nigri- 
cans taken in Massachusetts this winter, with one taken in Labra- 
dor in July and with several of littoralis taken in Nova Scotia 
in winter side by side with their backs up before various members 
of the Nuttall Ornithological Club. No one has had any difficulty 
in at once picking out the specimens of littoralis from those of 
nigricans. 
The Acadian Chickadee is the resident race in northern New 
England as it is in Nova Scotia and New Brunswick. All of Mr. 
Brewster’s Umbagog specimens are of this race; and several speci- 
mens sent me from the Victoria Memorial Museum by Mr. P. A. 
Taverner taken in the Gaspé Peninsula, are also plainly the same. 
I have studied nine Massachusetts specimens of these northern 
Chickadees taken in previous winter migrations. Six of these are 
in the collection of Mr. Wm. Brewster, one from Mr. H. M. Spel- 
man, one from Mr. J. L. Peters and one from the Museum of 
Comparative Zoélogy. Five appear to be Acadian, and four Labra- 
dor Chickadees. The records and measurements of all are given in 
the following table, which also includes those of the eleven speci- 
mens of negricans taken this winter. For comparison, I have given 
the measurements of two specimens of nigricans taken in Labrador, 
two of littoralis taken in Nova Scotia and three specimens of hud- 
sonicus from Mackenzie and Alberta. 
I am greatly indebted to Mr. Wm. Brewster and to Mr. Outram 
Bangs for the opportunity of examining specimens and for their 
kind assistance in this study. 
