Departmental Activities. 



Ill 



in five Pretoria town gardens. Some of the parasites were turned 

 io( se in tiie trees and others confined in long- narrow bags of fine 

 muslin drawn over infested branches. Some hundreds were put on 

 infested cuttings being kept standing in water under close cover in 

 the office laboratory at Pretoria. The parasite seems to be quite an 

 important enemy of woolly aphis in America. It is still too early 



American Woolly Aphis Paeasite. 



Many specimens were liberated within bags of fine muslin drawn over 

 branches heavily infested with woolly aphis. 



to predict Avhether or not the attempt to establish it in South Africa 

 will succeed, but hope is at present running high, and by the time 

 these lines are printed sufhcient time will have elapsed for one South 

 African generation of the insect. 



