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THE FAUNA OF MONTANA TERRITORY. 77 
ness of the season, I suspect that it breeds in these regions, 
migrating to the coast for the winter, where I found it from 
October to May, in 1854. In habits it resembles the other 
Savannah Sparrows. 
Lark Fincx ( Chondestes grammaca). Common near Fort 
Benton, and occurring in small numbers on the prairies in 
and west of the Rocky Mountains. 
WHITE-CROWNED Sparrow ( Zonotrichia Gambelii, or Z. 
leucophrys?). I found this species only in the Cœur d'Alene 
Range, from which circumstance I suppose it to be the Z. 
Gambelii. The young specimen preserved had brown feet, 
while the adult has them yellow in summer, but brownish in 
winter. 
OREGON Snowsrrp (Junco Oregonus). I saw no Snow- 
birds until September 1st, after which migrating flocks were 
common. I could only distinguish this species among them, 
though I saw some of a paler hue about the head, probably 
from immaturity. 
Curprine Sparrow (Spizella socialis). Common through- 
out the journey, and nests were found on the Upper Missouri. 
Brewer’s Sparrow (S. Brewerii). I found flocks, appa- 
rently of this species, on the eastern slope of the mountains 
only, migrating South in August. Two which I shot I took . 
for the young of S. socialis, and did not preserve them, but 
I now think they were of this species. They frequented the 
open pine woods, which the former rarely does, preferring 
prairies, 
The distinction of this from S. pallida is like that of young 
birds of the genus generally, and the lists of specimens given 
by Baird show that all may have been young birds, judging 
from the period of the year they were collected in. 
Western Sone Sparrow (Melospiza rufina). This Song 
Sparrow was common in the Rocky Mountains, and appeared 
to me to resemble M. rufina of the Pacific Coast in every 
respect, 
BLUE LINNET ( Cyanospiza amæna). I saw this bird on 
