THE CANADIAN ENTOMOLOGIST. 



93 



V:^:- 



e« 



Aleurodes graminicola (Figs. 19-21); A. Rolfsii (Figs. 22-24). 



Figure 20. — Margin of pupa-case. 



Figure 21. — Vasiform orifice, operculum and lingula of pupa-case. 

 Aleurodes Rolfsii. 



Figure 22. — Pupa-case. 



Figure 23. — Vasiform orifice, operculum and lingula of pupa-case. 



Figure 24. — Wing of adult. 



