— 88 — 



to use against it when conditions are favorable and necessity 

 demands it. 



Allow also the assertion to be made here that no one remed}' 

 — disease or mechanical, natural or artificial — can be recom- 

 mended to the exclusion of all others when it comes to dealing 

 with so formidable a pest as is ScJiistocerca paraiieiisis. 



Conclusion. 



In conclusion the writer would suggest that these studies, 

 which have already resulted in the accumulation of many very 

 interesting facts in the life-history, habits and distribution of 

 our locust, be continued. 



There still remain some important facts connected with the 

 insect's life which should be definitely settled before reliable 

 predictions can be made relative to future movements and 

 possible injuries. Some of these are connected with its move- 

 ments, wintering, egg-laying, possible permanent-region, dis- 

 tribution, etc. Many of these facts can be obtained by the 

 accumulation of reports from volunteer-observers located 

 throughout the regions at times visited by the moving mangas 

 of locusts. These reports can be sent to some central point, 

 and the facts there tabulated to be studied later. 



The knowledge now possesed roughly indicates what may 

 be looked for later, but is still indefinite on a few^ important 

 points in the insect's life-histor}'. 



