CATALOGUE OF CANADIAN BIRDS. 575 
oth, and we saw two about the buildings at White pass summit, 
June roth; at Log Cabin they were common, June 14-20th; a few 
were noticed at Lake Bennett, June 19-21st. I refer all seen to this 
sub-species, because all had remarkably long tails. (Bishop.) 
Walking along the hills near the village of St. George on May 28th, 
1890, with Mr. Ed. Lavender, we saw a swallow skimming along the 
edge of the cliff, catching the flies which the warm sun had enticed. 
from the crevices of the rocks. Shortly afterwards it flew just over 
my head while among the houses of the village. Drs. Noyes and 
Hereford, who have each spent more than ten years on the island, 
assured me that a swallow was unknown there, but later in the 
evening I had the opportunity of showing them the bird on another 
part of the cliff; it remained about the village for nearly two weeks; 
on June 4th, while standing on Black bluff, St. Paul, I watched a 
swallow coming into the land and then fly northward up the island; 
I found a nest at Unalaska, on August 13th, containing three large 
young, a male and two females and secured the adults also; the nest 
is of mud held together by grass rootlets; it is nine inches wide by 
four inches deep, the cavity is two and a half inches in diameter and 
one and three-quarter inches deep; grass rootlets encircle the cavity, 
which is well lined with gull and raven feathers; it was built in a 
large cavity, almost a cave, of a rock on a hillside, and was placed 
on the slightly sloping face of the back portion, about its centre; a 
slight inequality of the rock face was sufficient to hold it in place; 
to enter the cavity the birds had to fly to the face of the rock and 
then dip downward between the rock and many tall plants, which 
effectually hid the opening; I saw no others. (Palmer.) 
CCXLII. TRIDOPROCNE COUKS. 1878. 
614. Tree Swallow. 
Iridoprocne bicolor (VIEILL.) COUES. 1878. 
Common at Big island in the Koaksoak river near Fort Chimo 
where it breeds abundantly; abundant throughout the northern 
portions of Labrador. (Packard.) A very common summer 
migrant at Cow Head, Newfoundland. (Reeks.) A common sum- 
mer resident at Halifax, N.S. (Downs.) Common in Nova Scotia 
from April 20th to September. (H. F. Tufts.) A common summer 
resident at Sydney, Cape Breton, island. (C. R. Harte.) Rather 
