PLATE I. 

 Fig. 



1. Eggs of Coccididse. 



2. Larva of Diaspidinoe. 



3. Diagram of life-history of female Diaspidinse. a, pellicle of larva ; 6, second 



pellicle ; c, adult female somewhat shrivelled after egg-laying ; d, eggs ; 

 e, secreted matter forming the "scale." In this diagram the scale is 

 shown as overturned. 



4. Types of various spinnerets, a, simple orifices (Mytilaspis) ; 6, double orifice 



(Planchonia) ; c, multilocular orifice (Ctenockiton) ; d, multilocular orifice 

 (Ccelostoma) ; e, simple protruding spinneret (Aspidiotus) ; /, serrated pro- 

 truding spinneret (Mytilaspis drimydis) ; g, protruding spinneret (Aeant^o- 

 coccws) ; k, conical spiny spinneret and cottony secretion (Pliizococcus); 

 m, lanceolate spinneret and glassy secretion (Inglisia) ; n, group of abdo- 

 minal spinnerets, with detached orifices (Mytilaspis) ; p, double multi- 

 locular orifice (Ccelostoma) ; s, coronetted spinnerets and part of glassy 

 secretion (leery a). 



5. Rostra, a, simple rostrum of Diaspidince ; 6, rostrum and trirnerous mentum 



of Coccidinse. 



6. Foot of a female insect, c, coxa ; tr, trochanter ; , femur ; ti, tibia ; 



ta, tarsus ; cl, claw. 



7. Foot of a male insect. The letters as in Fig. 6. 



8. Foot with digitules, upper and lower. 



9. Type of female antenna (Ctenochiton). 



10. Type of female antenna (Dactylopius}. 



11. Type of antenna of larva (leery a), 



12. Type of male antenna (Fiorinia), 



13. One joint of antenna of Monophlebidse (Icerya), 



14. Diagram of head of male of Lecanidinse (after Signoret), both dorsal and ven- 



tral aspects being shown together, a, antennae ; e, e, true eyes, the lower 

 pair being on the ventral surface in the place of the mouth; oc, oc, ocelli. 



15. Head of male Icerya, with facetted eyes, 



16. Wing of male insect, n, nervure, 



