\A^T (W ILLUSrUiVTIONS. 



INTRODUCTION. 



1. Kggs oi Arctia mentha>^tri . 

 •2. Eggs of Bombyx nemtria on 

 birch .... 

 .'}. Typical forms of larvie 



4. Typical pupal form of an 



insect .... 



5. Pupal case of Vanessa urtiaa 

 G. First emergence of Tor- 



toiseshell Butterfly from 

 pupal case 



7. Emergence of Tortoiseshell 

 liuttertiy more fully ad- 

 vanced .... 



■S, 9. Fully developed Tortoise- 

 shell Butterfly 



10. Typical mouth parts of in- 



sects .... 



11. Compound eye of insect as 



seen under the micro- 

 scope .... 



12. Typical forms of antennae . 



13. Typical form of leg . 



14. Diagram of longitudinal 



section of an insect 



15. Horizontal section througli 



the head of a blow-fly . 



1 6. Diagram of the cliief trunks 



of tiie ti-acheal system of 

 an insect 



17. Trachea of butterfly . 



I 8. Food canal of cockroach . 



19. Diagrams of the heart of 



an insect 



20. Female genital organs of 



tile cockchafer 



'A OK 



4 



21. Male genital organs of the 



cockchafer . . .17 



ERIOPHYIDrE ((iALL-MlTES). 



22. Eriophyes rudis . . 21 



23. Abortive sv/oUen buds on 



hazel caused l)y Eriophyes 

 np(dlan<t' . . .24 



24. Abortive swollen buds on 



' birch .... 25 



25. Abortive swollen l)uds on 



English yew . . 2G 



26. "Nail-galls" on leaf of 



lime-tree . . .27 



27. < Jails on leaves of field 



maple caused by Erl- 

 ophyes macrochehis . 28 



28. (ialls on leaf of field maple 



caused by Eriophyes 

 macrorhynchus . . 29 



29. ( ialls on leaves of common 



alder caused by I'Jriophyes 



12 30. 



33. 



( Jails on midrib of the leaves 

 of common alder caused 

 by Eriophyes axillaris . 



Galls on leaf of Wayfaring- 

 tree caused by Eriophyes 

 tetanolhrix 



Malformation of the flower 

 of ash caused by Eri- 

 ophyes fraxini 



Edges of hawthorn leaf 

 rolled inwards by Eri- 

 0})hyes (/oniofhorax 



29 



29 



30 



