of the sphinx caterpillars so that they will not appear the following 

 season to do much harm. Where the caterpillars can be easily 

 gathered, it will pay to pick them from the leaves and transfer them 

 to barrels or large boxes covered with wire netting. This will prevent 

 the caterpillars from issuing or falling a prey to birds or other ani- 

 mals, and will insure the issuance of the parasites through the meshes, 

 thus encouraging their good work. A few holes should be bored in 

 the bottom of the barrels or boxes used, small enough to prevent the 

 caterpillars from crawling through them into the ground. This will 

 prevent the accumulation of water after rains which might drown 

 the insects or set up putrefaction in the mass. 



If the cooperation of neighbors who have catalpa trees growing on 

 their premises can be secured, this caterpillar can be largely controlled 

 for several years in succession. 



Approved : 



James Wilson, 



Secretary of Agriculture. 



Washington, D. C., November 6, 1907. 



[Cir. 9G] 



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