CATALOGUE OF CANADIAN BIRDS. 357 



420a. Western Nighthawk. 



Chordeiles virginianus henryi (Cass.) Coues. 1872. 



On June 7th, 1892, two were observed at Indian Head, Sask., 

 and by the loth 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 ^■t Medicine Hat, June 3rd ; also at Wood mountain, 

 June loth, 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 nth at Victoria, and first seen at Comox, 

 June 15th; on August i8th, 1893, saw a flock of at least 200 at 

 Sooke ; they appeared to be going southward. (Spreadborotcgh.) 

 I have found this bird nesting throughout Saskatchewan and Alberta, 

 laying its two eggs on the ground in the poplar bluffs. (W. Raine.) 

 A summer resident in British Columbia; breeds on the mainland 

 and Vancouver island. {Fannin.) All specimens observed in the 

 mountains are referred here. 



Some of the above references should doubtless be transferred to 

 sennetti. 



420C. Sennett Nighthawk. 



Chordeiles -virginianus sennetti (CouES) Bishop. 1896. 



Treeless region of the Great Plains from the Saskatchewan south- 

 ward to Texas. {Sup. VIII. to the A. 0. U. Check-list.) 



Our specimens have not been taken on the treeless plains and 

 though some of the references under C. -virginianus and henryi 



