PLATE III. 

 TYPES OF LAST ABDOMINAL SEGMENTS OF THE 



Fig. 



1. Aspidiotus coccineus (after Comstock) ; no groups of spinnerets. 



2. Diaspis ros<% ; five groups of spinnerets. 



3. Mytilaspis cordylinidis ; five groups of spinnerets and single orifices. 



4. Mytilaspis pyriformis ; five groups of spinnerets, almost forming an arch. 



5. Chionaspis dysoxyli ; five groups of spinnerets. 



6. Poliaspis media ; eight groups of spinnerets. 



7. Fiorinia astelice ; arch of spinnerets. 



8. Fiorinia stricta ; five groups of spinnerets, the three upper groups almost 



forming an arch. 



