78 



of 99.4 per cent. A continued effect of the insecticide to arrest re- 

 production or to prevent the establishment of the young- is shown 

 by the fact that only nineteen scales out of eig-ht thousand six 

 hundred were found on these trees five months after treatment, 

 and that these living- scales had evidently entered the single tree 

 on which they were found from an adjacent infested hedge. 



Second Lot of Trees. California Wash, 

 Nine trees, partly apple and partly peach, sprayed with lime, 

 sulphur, and salt on the 5th of March. Weather clear, with fairly 

 Lot II. Si'RAVKi) with I.imi:, Suli'hur, and Salt, March 5. 



