CATALOGUE OF CANADIAN BIRDS. 357 
420a. Western Nighthawk. 
Chordeiles virginianus henryt (Cass.) CouEs. 1872. 
On June 7th, 1892, two were observed at Indian Head, Sask., 
and by the roth they were common. I have seen them sitting on 
poplar trees by the shore of Deep lake, ten miles from Indian Head, 
in the day time; very abundant all summer; breed in the vicinity. 
First seen in 1894 at Medicine Hat, June 3rd; also at Wood mountain, 
June roth, 1895; afterwards it was common and in large numbers 
at Frenchman river and Cypress hills, near Cypress lake; it is a com- 
mon species in the prairie region and was seen along Milk river, St. 
Mary river and Lee creek at Cardston, Alta. This form was abun- 
dant on the International Boundary, between Trail and Cascade, 
B.C., in the summer of 1902. Rather rare and breeding at Banff, 
Rocky mountains; heard occasionally at Deer Park, Lower Arrow 
lake, B:C’; in June, 1890. Breeding in numbers on the rocks 700 
feet above the Columbia at Robson, B.C., and west of Pass creek; 
breeding on bare rocks without any sign of a nest. Eggs two. 
The bird often flies in the daytime. Common at Sicamous, Kam- 
loops and Spence Bridge. Observed at Chilliwack, B.C., and up 
the river as far as Thurston’s; a summer resident on Vancouver 
island; one seen on June 11th at Victoria, and first seen at Comox, 
June 15th; on August 18th, 1893, saw a flock of at least 200 at 
Sooke ; they appeared to be going southward. (Spreadborough.) 
I have found this bird nesting throughout Saskatchewan and Alberta, 
laying its two eggs on the ground in the poplar bluffs. (W. Razne.) 
A summer resident in British Columbia; breeds on the mainland 
and Vancouver island. (/annin.) All specimens observed in the 
mountains are referred here. 
Some of the above references should doubtless be transferred to 
sennettt. 
420c. Sennett Nighthawk. 
Chordeiles virginianus sennettt (COUES) BISHOP. 1896. 
Treeless region of the Great Plains from the Saskatchewan south- 
ward to Texas. (Sup. VIII. to the A. O. U. Check-list.) 
Our specimens have not been taken on the treeless plains and 
though some of the references under C. wirginianus and henryr 
