406 



INSECTS INJURIOUS TO THE ORANGE. 



large quantities of the broad scale-insects which occur in 

 multitudes on the English ivy grown there. 



Both sexes of a third parasite, Encyrtus jiavus Howard, 

 are shown in Fig. 420, a representing the male, 6 the female. 



Fig. 420. 



The wings of the former measure, when spread, about one- 

 eighth of an inch ; those of the latter, one-tenth of an inch. 

 The basal third of the fore wings of the female is trans- 

 parent, the middle third dusky brown, crossed by a clear 

 transverse band; the outer third is also dusky brown, with 

 two large, wedge-shaped, transparent spots entering it, one 

 from each side. The hind wings are nearly transparent ; the 



