94 THE CANADIAN ENTOMOLOGIST. 



THE BUTTERFLIES OF LAGGAN, N. W. T.; ACCOUNT OF 



CERTAIN SPECIES INHABITING THE ROCKY 



MOUNTAINS IN LATITUDE 51° 25'. 



BY THOMAS E. BEAN, LAGGAN, ALBERTA. 



The Locality. — Laggan is a telegraph station of the Canadian 

 Pacific Railway, 956 miles west of Winnipeg as the railway runs, and six 

 miles east of the British Columbia eastern boundary. A mile west of 

 Laggan the railway leaves the Bow River Valley, and turns more directly 

 west into the valley of Noore's Creek to cross the central range of the 

 Rocky Mountains, the summit of the pass being six miles from Laggan. 

 Directly east of Laggan, Pipestone Creek, flowing from the north, joins 

 the Bow ; its sources are about twenty miles to the north, among the 

 crags of the Sawback Range, only a few miles distant from the headwaters 

 of the Red Deer River. A short distance west of Laggan, Noore's Creek 

 enters the Bow : this stream, although scarcely ten miles long, carries, on 

 warm days, a great volume of water, derived from an extensive snow field 

 on the eastern face of the Waputtehk Range. The Bow River itself, ris- 

 ing about latitude 51° 45', flows southeast for a long distance in an ele- 

 vated shallow valley parallel to the axis line of the Rocky Mountains, and 

 close to the basal slope of the central range of peaks. At Laggan, the 

 surface of the river, at its ordinary summer level, is but three hundred feet 

 below the elevation of the summit of Kicking Horse Pass. 



The entomological ground, whose butterflies I propose to speak of, is 

 chiefly a limited district immediately around Laggan, comprising, on the 

 east, the valley of the Bow to a distance of four miles, and on the west 

 the same valley for two miles ; embracing on the southwest the valley of 

 Noore's Creek, and the summit valley of Kicking Horse Pass to a point 

 about three miles west of the British Columbia boundary ; and extending 

 on the north from the level of the Bow to the peaks of the nearest of the 

 " Slate Mountains." A less complete examination has been made for 

 nineteen miles east along the railway, and above timber line upon moun- 

 tains at Stephen and Hector ; also between the Bow River and Emerald 

 Lake, three miles south. 



As regards continental position, Laggan is about one hundred and 

 sixty-five miles north of the international boundary, on a line with the 

 western boundary of Montana, in the same longitude as the Great Slave 



