INSECT ENEMIES OF WESTERN FORESTS 



65 



April and May 



Mating. Migrating females and 

 uinged males emerge from 

 overwintering preadults. ^ 



May and June 



-First stage larvae settle on 



temporary feeding spots. ^ 



May 



Egg laying. Females and eggs 

 covered by fluffy ui ax. 



July and August 



Second stage laraae in 



permanent feeding position. 



September to February 



Third stage preadnlts partially enclosed 

 by shed second skin. 



February toApnl 

 Preadults ouerutinter 

 under needle brads. 



Figure 27. — Seasonal history of the Prescott scale (Matsucoccus vexillorum) 



