126 THE CANADIAN ENTOMOLOGIST. 



numerous and very active. Yet, by far the greater part of the louse de- 

 struction here was accompHshed by this new species — Aphidius gran- 

 ariaphis. June 30th. — The heads of 

 wheat were tlironged with healthy 

 vigorous Hce, with but few of the Hght 

 colored rounded parasitized lice — see 

 figures. Ten days later the lice were 

 nearly gone, and the parasitized ones 

 were largely in the majority. Rapidly 

 Fig. 4. as the lice increase, they seem to be 



no match in this respect for the parasites. 



I think the grain lice Aphis (Siphonaphora) aveucC destroyed at 

 least one-third of the wheat crop of Michigan last year, and greatly 

 injured the balance of the crop. Had it not been for these parasites we 

 should have had, I think, no crop at all. 



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. 

 ( Continued from page gg. ) 

 Definite Marks of the ^ . — Observation of 62 caught specimens 

 enables me to supplement, in some degree, Mr. Strecker's description. 

 The smallest measures 46 mm., equal to 1.8 inch. The largest is 

 58.5 mm., or 2.3 inches. The average expanse of the 62 is 52.5 mm., or 

 2.07 inches. The cell spot above primary is larger than in the males, 

 and has never that semi-obsolete appearance which it presents in some of 

 the males ; it varies from a small but definite spot of .5 mm. in diameter 

 to a spot of 1.5 mm., is usually sub-rotund, sometimes sub-linear, and is 

 frequently centered with yellow in moderate degree. On under side hind 

 wing the dark nucleus or " patch" of costa is lacking- in all, and the sub- 

 marginal series of dark spots beneath both wings is found to be plainly 

 presented only in three specimens, with slight traces in fifteen others. 

 Elis $ varies greatly as to condition of border above primary ; a few of 

 my specimens have a completed dark border, much as in an average 

 Hec/a, with the yellow spots small and entirely enclosed. These, how- 

 ever, are extreme instances. At the opposite extreme are specimens 



