25 



Fig. 14.— Imported Elm Bark Louse. 

 a, Female before impregnation, greatly enlarged; h, male cocoons in natural 



position on limb, natural size ; c, perfect male, greatly enlargerl. 

 Life). 



(From Insect 



It is possible that good results might be obttiined by spraying with 

 the emulsion of the ordinary strength during midsummer when the 

 young are very small. Mr. J. H. Bowditch of Brookline reports that 

 he rid some small trees of them by cleaning with a stiff brush, and 

 this method, though laborious, seems quite advisable where only a 

 few young trees are concerned. The brushing should, of course, be 

 performed during the fall or winter when the insects are on the trunk 

 and branches. 



The formula usually employed in preparing kerosene emulsion is 

 as follows : 



Common bar soap, ^ pound, 



Kerosene oil, 2 gallons, 



Water. 1 gallon. 



