THE FAUNA OF MONTANA TERRITORY. 93 
Rocky Mountains, as far west as the Cœur d’Alefie Range, 
and I noticed no difference in its habits or in its single call- 
note of this season, from those of eastern specimens. . I did 
not notice it along the Missouri, nor did Dr. Hayden collect 
it above Vermilion river, near the Iowa line. 
AUDUBON's WARBLER (Dendroica Audubonii). This was 
the only bird of the genus I saw. It was very common 
throughout the mountains, and I have found it in every por- 
tion of the country west of them, even where there was 
scarcely a bush to be seen. 
Repstart (Setophaga ruticilla). The Redstart was one 
of the commonest birds in the Missouri bottom-lands, and 
I found several of its nests between Fort Union and Milk. 
river, in June. It continued pretty common as far west as 
the Cœur d'Alene Range. 
Western TawacER (Pyranga Ludoviciana). Less com- 
mon than near the coast, but reaching the east base of the 
Rocky Mountains, though not seen down the Missouri river. 
The specimen preserved is larger than any measurements 
recorded by Baird. 
Barn Swarrow (Hirundo horreorum). The Barn Swal- 
low occurs in small numbers entirely across the Great Plains 
of Nebraska, but seems to limit its summer residence to 
tracts where it can find caves in which to build, as I saw no 
sign of its nests about the trading posts, where the more 
abundant Cliff Swallow has full possession of every available 
position for a nest.. I saw the former, however, near Fort 
Benton in July, and in some parts of the Rocky Mountains 
afterwards. ` 
Curr Swarrow (H. lunifrons). Swarms of this species 
occurred at every suitable cliff along the Missouri, and across 
the Rocky Mountains fo Coeur d'Aleüe Mission, where they 
remained until September 18th. 
Swarrow (H. bicolor or thalassina?). I saw a flock of 
one or the other species flying over Bitterroot river, about 
September 1st, and remarked them because I had not seen 
. AMER. NATURALIST, VOL. mm. 5 

