USTRATIONS. 



Pnge. 



Fig. 1. Lecanium nigrofasoiatuni ]2 



2. Mytilaspis pomorum j3 



3. Mytilaspis pomorum ]3 



4. Chionaspis furfurus X4 



5. Aspidiotus perniciosus, on branch 16 



6. Aspidiotus perniciosus, female 17 



7. Aspidiotus perniciosus, on fruit and branch 18 



^. Aspidiotus ostreseformis 19 



9. Aspidiotus juglans-regise 20 



10. Aspidiotus rapax _ 21 



11. Diaspis pentagona. . : 22 



12. Aulacaspis rosee 22 



13. Eggs of plant louse 23 



14. Schizoneura lanigera 24 



15. Schizoneura lanigera, work on roots , 24 



16. Aphis persicee-niger 25 



17. Psylla pyricola 27 



18. Ceresa bubalis 28 



19. Clisiocampa americana 29 



20. Hyphantria cunea 30 



21 . Euproctis chrysorrhea 31 



22. Orgyia leucostigma 33 



23. Porthetria dispar, moth 33 



24. Porthetria dispar, larva 34 



25. Porthetria dispar, chrysalis 34 



26. Alsophila pometaria, moths 35 



27. Alsophila pometaria, stages 35 



28. Paleacrita vernata, moths - 35 



29. Paleacrita vernata, stages 35 



30. Sanninoidea exitiosa 36 



31. Anarsia lineatella - ^^ 



32. Thyridopteryx ephemerseformis, cases 37 



33. Thyridopteryx ephemerseformis, insects 37 



34. Tmetocera ocellana, larva - 38 



35. Tmetocera ocellana, work of -"8 



36. Saperda Candida - 39 



37. Chrysobothris femorata - - 40 



38. Agrilus sinuatus, stages - - 40 



39. Agrilus sinuatus, work of 41 



40. Scolytus rugulosus 42 



41. Amphicerus bicaudatus - 42 



42. Rhagoletis pomonella 44 



43 Khagoletis cingulata 45 



7 



