102 



showed that they were especially susceptible to the influence of 

 pyrethrum, and that a single thorough apphcation to a tree would 

 kill all upon it at the time. 



The above brief account of these insects is given merely to set at 

 rest the fears of those who, like my correspondents, may be led to 

 attribute to them serious mischief really due to quite other causes. 



