14 BULLETIN 1(>40, U. 5. DEPARTMEXT OF AGEICULTURE. 



inches of water are in tlie bottom of tlie tank, the soap powder is sifted in 

 as the tank is being filled and the agitator is running. The oil is added last 

 before the tank is full. 



Fig. S. — Three burlap bands from the trunks of orange trees following spring migration 

 of the citrophilus mealybug. 



It was felt that the spraying of the bands was not entirely satis- 

 factory unless the greatest care was used, so in subsequent work it 

 was decided to dip them just before spraying. The application, to 



