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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 7 



The life history is briefly as follows: The females continue to de- 

 posit their eggs on the leaves of the grass and the young larvge develop 

 through the fall until the snow covers the ground, but only the adults 

 appear to survive the winter. The adults hibernate and appear to 

 be able to withstand exposure to a temperature of —21° F. according 

 to Hinds. In Canada, however, they are able apparently to withstand 

 lower temperatures than this judging by the distribution of the injury. 



Fig. 19. Anaihrtps striatus Osb. (After Fernald and Hinds.) 



In 1912, the lowest temperatures in Alberta were: Edmonton —46° F.. 

 and Calgary —30° F.; in Saskatchewan, at Battleford, —53° F., and 

 Qu'Appelle —47° F.; in Ontario at Ottawa, the lowest temperature 

 was —27° F. The females become active in the spring probably as 

 soon as the snow disappears, and oviposition soon begins, lasting from 

 four to six weeks in many cases. Each female is capable of depositing 

 from fifty to sixty eggs. The eggs may be easily seen in the leaf by 

 holding it before a light when they appear as small lightish spots ; they 

 may be separated from the leaf by stripping off the epidermis. The 

 length of the egg state in the spring is from ten to fifteen days, and in 

 the summer from four to seven days. The length of the larval stage 



