A. D. WILLIS, WANGANUI, N. Z.
W.M.M., delt. ad. nat
PLATE II.
Plate III.
Types of Last Abdominal Segments of the Diaspidinæ.
Fig.
1. Aspidiotus coccineus (after Comstock); no groups of spinnerets.
2. Diaspis rosæ; 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 asteliæ; arch of spinnerets.
8. Fiorinia stricta; five groups of spinnerets, the three upper groups almost forming an arch.