THE CANADIAN ENTOMOLOGIST. 145 



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



CFRTAIN SPECIES INHABITING THE ROCKY 



MOUNTAINS IN LATITUDE 51 25'. 



EY THOMAS E. BEAN, LAGGAN, ALBERTA. 



{Continued from page IJ2, Vol. 22.) 

 Elevations in Vicinity of Laggan. — Altitudes near Laggan have 

 in some cases been very incorrectly stated. In " Appleton's Canadian 

 Guide-Book ; Western Canada," published 1892, the altitude of Louise 

 Lake (Emerald Lake of the Geological Survey) is given as one thousand 

 feet above Laggan, and the elevation of Agnes Lake is stated at three 

 thousand five hundred feet above Laggan. Such statistics are worse 

 than useless. 



The elevation of the Canadian Pacific Railway at Laggan, by latest 

 profiles, is five thousand and eight feet. Emerald Lake is five hundred 

 to six hundred feet higher — its elevation can hardly exceed five thousand 

 six hundred feet. Agnes Lake is about two hundred feet below the 

 normal timber-line, so that its altitude is not far from six thousand eight 

 hundred feet ; it is eighteen hundred feet above Laggan, and pretty ac 

 curately twelve hundred feet higher than Emerald Lake. 



According to the Geological Survey Reports, timber-line on the 

 mountains around Laggan occurs at about seven thousand feet. This 

 elevation compares with an altitude in Colorado of something over eleven 

 thousand feet. Gannett's " Dictionary of Altitudes" gives U. S. Survey 

 estimates of 31 timber-lines in Colorado, of which 29 are above eleven 



thousand feet. 



Carterocephalus pal/Emon, Pallas. 



Paniscus, Fabricius. 

 Mandan, Edw. 



Material of Mandan examined: — 1 A from Nepigon (Mr. Fletcher) ; 

 36 local $ s, some imperfect, but nearly all bright and readable ; 1 £ , 1 

 $ from Banff (Mr. H. K. Burrison); 12 local ? s, all being legible, and 8 

 of them bright and fine. Examples of Palcemoji compared : — 4 $ s, 2 $ s 

 from Germany ; 2 $ s, 1 $ from Zurich, Switzerland ; 2 $ s from north- 

 ern Finland. 



This examination was undertaken because from frequently repeated 

 comparisons of the Bow Valley Mandan with Pahemon the essential 

 agreement of the two had become evident. Until this final study was 



