LIST OF ILLUSTRATIONS. 



FIG. 



1. The Slave-making or Amazon Ant (Polyergus rufescens). 



2. Larva, Chrysalis, and Cocoon of the Horse Ant (Formica rufa). 



After Blanchard. 



3. The Horse Ant (Formica rufa) : Male, Female, and Worker. 



After Blanchard. 



4. The Mexican Honey Ant (Myrmecocystus mexicanus). After 



Blanchard. 



5. The Sauba Ant (Oecodoma cephalotes]. Two sisters. 



6. The Rose Aphis (Aphis ROSCE). After Blanchard. 



7. A Root-feeding Aphis. 



8. The White Woodlouse (Platyarthrus hojfmanseggii) + to. After 



Spence Bate. 



9. Claviger. After Shuckard. 



10. The Slave Ant (Formica fusca). 



11. The Caterpillar of the Marbled White Butterfly (Arge galathea). 



After Weissmann. 



12. The Caterpillar of the Eyed Hawk-moth (Smerinthus ocel- 



latus). After Weissmann. 



13. The Caterpillar of the Elephant Hawk-moth (Ch&rocampa 



elpenor). Full grown, natural size. After Weissmann. 



14. The Caterpillar of the Elephant Hawk -moth (Charocavipa 



elpenor). First Stage. After Weissmann. 



15. The Caterpillar of the Elephant Hawk-moth (Charocampa 



elpenor}. Second Stage. After Weissmann. 



1 6. The Caterpillar of the Elephant Hawk-moth (Charocampa 



elpenor). Just before the second moult. After Weissmann. 



17. The Caterpillar of the Elephant Hawk-moth (Cha:rocampa 



elpenor). Third Stage. After Weissmann. 



