96 CEREAL AND FORAGE INSECTS. 



This argument, which is a common one, puts an end to all mechan- 

 ical means of control of this pest, except possibly as a federal measure, 

 at public expense, and leaves the matter of the introduction of insect 

 parasites as perhaps the only feasible way to reach a solution of this 

 puzzling question. Continued study may discover other means, 

 but so far as the investigation has been carried no ready relief is yet 

 in sight. 



o 



