328 GEOLOGICAL SURVEY OF CANADA. 



420a. Western Nighthawk. 



Chordeiles virgi'.ianus henryi (Cass.) Coues. 1872. 



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

 and by the loth they were cpmmon. 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 ; breeds in 

 the vicinity. First seen in 1894 at Medicine Hat, June 3rd ; also 

 at Wood Mountain, June lOth, 1895 ! afterwards it was common 

 and in large numbers at Frenchman's River and Cypress Hills, 

 near Cypress Lake ; it is a common species in the prairie region 

 and was seen along Milk River, St. Mary's River and Lee's Creek, 

 at Cardston, Alta. This form was abundant 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. All specimens observed in the mountains 

 are referred here. Common at Sicamous, Kamloops and 

 Spence's Bridge. Observed at Chilliwack, B.C., and up the river 

 as far as Huck'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, sa^r a flock of at least 200 at Sooke ; they 

 appeared to be going southward. {Spreadborough) I have found 

 this bird nesting throughout Assiniboia 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.) 



museum specimens. 



Nine ; one taken at Indian Head, Assa. ; one at Robson, Col- 

 umbia River, B.C. ; one at Banff, Rocky Mountains ; four at 

 Trail, B.C., and two at Kamloops, B.C. ; all by Mr. Spreadborough. 

 One set of eggs taken at Robson, Columbia River, B.C., June 22nd, 

 1890, by Prof. Macoun. Another set of two taken at Atlin Lake, 

 B.C., June 25th, 1900, by W. H. Boyd. 



420c. Sennett's Nightliawk, 



Chordeiles virginianus sennetti (Coues.) Bishop. 1896. 

 Treeless region of the Great Plains from the Saskatchewan 

 southward to Texas. (Sup. VIII. to the A. 0. U. Check-list.) 



