PROCEEDINGS, 1918 



81 



Control. 



The damage to the flower stalks from the ovipositing fe- 

 males is hard to deal with, but that from the feeding punctures 

 of the insects can be readily overcome. It was found that a 

 strong spray consisting of nicotine sulphate (Blackleaf 40) 1 

 pint to 100 gals, of water to which four pounds of soap had been 

 added, gave a perfect control of the insect if properly applied. 

 The work should be done soon after the insects hatch and with 

 as high a pressure as possible. 



Acknowledgments. 



The writer desires to thank Mr. W. E. Whitehead for val- 

 uable laboratory assistance in the work with this insect and for 

 the drawings, which are by his hand. 



Fig. 



1. 

 1 A 



2. 

 3. 

 4. 

 5. 



6. 



7. 



Explanation of Plate No. V 



Lygus campestris, 



Terminal segment of male from 

 the dorsum showing claspers 



(x50) 



