THE MONTHLY BULLETIN. 335 



fall periods. The best method for controlling this pest consists of 

 spraying the trees with a carl)olic acid emulsion spray. This should 

 be applied during tlie winter or in the spring when the young mealy- 

 bugs are hatching. Fumigation will destroy many of them, but is not 

 recommended unless the grower is endeavoring to treat the trees for 

 the red, yellow, black or purple scales, at which time many mealy-bugs 

 will be killed. 



Errata. 



On pages 293 and 294 of Volume 111, No. 7, of the Monthly Bulletin, 

 the spray formula for the hop aphis and the red spider on hops should 

 have read "flour paste four gallons" instead of "flour paste four 

 pounds." 



