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328 GEOLOGICAL SURVEY OF CANADA. 
420a. Western Nighthawk. 
Chordetles virgt.tanus henryt (Cass.) Cours. 1872. 
On June 7th, 1892, two were observed at Indian Head, Assa., 
and by the 1oth 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; breeds in 
the vicinity. First seen in 1894 at Medicine Hat, June 3rd; also 
at Wood Mountain, June toth, 1895 ; afterwards it was common 
and in large numbers at Frenchman’s River and Cypress Hills, 
near Cypress Lake ; it is acommon 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; asummer resident on Vancouver Island; one 
seen On June I1th 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 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. (/annzin.) 
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 Nighthawk. 
Chordetles virginianius sennetti (CouES.) BisHop. 1806. 
Treeless region of the Great Plains from the Saskatchewan 
southward to Texas. (Sup. VIII. to the A. O. U. Check-list.) 
