EXPERIMENT STATION BULLETINS. 



679 



Figure 14. 



Lccanium hcmisphaericum. — Antenna ; spiracu- 

 lar setae ; and ventral view of anal plates ; 

 sa, sub-apical setae; d, discal seta. 



Figure 15. 



Lecanium hespendum 

 var alienum. 



Figure 16. 



Lecanium hcmisphaericum. 



Mature females. 



