ILLUSTRATIONS IN THE TEXT. 



FIGS. PAGE 



1. Dorsal and ventral view of a generalised earwig . 8 



2. Callipers of British earwigs, males . . .10 



3.- -Deformed callipers of British earwigs . .11 



4.- -Extremity 'of abdomen of Labia minor, male . 30 



5. Antenna of Labia and Prolabia . . .36 



6.- -Wing of Forficula auricularia . . .41 



7. Egg of F. auricularia . . . .41 



8. Apex of abdomen of F. auricularia, male . . 41 



9. Apex of abdomen of F. auricularia, female . 41 



10.--Pronota of British Ectobii, males . . .64 



11. Mid leg of Periplaneta australasise . . 64 



12.- -Elytron and wing of Periplaneta americana . 65 



13. Ootheca of certain cockroaches . . .68 



14. Ectobius lapponicus and details . . .75 



15. Blattella germanica . . . . .88 



16. Blatta orientalis . . . . .95 



17. Periplaneta australasise . . . . 106 



18. Fore leg of Gryllotalpa gryllotalpa . .123 



19. Ovipositors of British Locustodea . . . 148 



20. Egg of Leptophyes punctatissima and of Metrioptera 



albopunctata . . . . .159 

 21. Apex of abdomen of Meconema thalassinum, male . 190 



22. Pronota of British Acridiodea . . . 202 



23. Elytron and wing of an Acridian grasshopper . 204 

 24. Tetrix subulatus ..... 209 



25. Ovipositor of Stenobothrus lineatus . . 233 



