No. 4.] THREE SHADE-TREE INSECTS. 247 



of elms. At the writer's suggestion, these elms were scrubl>ed 

 with strong kerosene emulsion and in July were thoroughly 

 sprayed with the dilute emulsion. The cost of the work, 

 taken from data kindly furnished by Mr. Manning, was as 

 follows : labor, $18 ; kerosene and soap, |3 ; a total expense 

 of $21, or 7 mills per tree. As a result of this treatment 

 over ninety per cent of the insects have been destroyed ; in 

 fact, it would now be difficult to find a more thrifty lot of 

 elms. This shows the comparative inexpensiveness of the 

 remedy and the good results attending its thorough applica- 

 tion. 



