Prats III. 
Typrs oF Last ABDOMINAL SEGMENTS OF THE DIASPIDINA. 
te Aspidiotus coccineus (after Comstock); no groups of spinnerets. 
2. Diaspis rose ; 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. Firinia astelia ; arch of spinnerets. 
8. Fiovinia stricta; five groups of spinnerets, the three upper groups almost 
forming an arch. 
