ILLUSTRATIONS. 



PLATES. 



Page. 



Plate I. Violet leaves showing injury by the Greenhouse Leaf -tyer. Frontispiece 



II. Violets showing injury by Plant-lice 42 



III. Leaves of violets showing injury by ' ' gall fly ' ' larva? 48 



IV. Prodenia commelinse, eudiopta and ornithogalli 58 



FIGUEES. 



Fig. 1. Phlyctsenia rubigalis in different stages 8 



2. Pionea ferrugcdis, venation of wings 8 



3. Loxostege simihdis, different stages 9 



4. Fumigating box, showing trays and coleus cuttings 21 



5. Diagram illustrating method of determining cubic contents of green- 



houses 23 



6. Violet house prepared for fumigation 24 



7. Emphytus canadensis, female, larva, pupa, and cocoon 27 



8. Emphytus canadensis, violet leaves showing injury; also eggs, egg cells, 



larvae in different stages, and adult at rest 28 



9. Tetranychus bimacidatus, adult 36 



10. Tetranych us bimacidatus, palpus 36 



11. Tetranych us bimacidatus, claws 36 



12. Hand sprayer 41 



13. Parts of hand sprayer 41 



14. Tip and greenhouse nozzle - 42 



15. Bhopcdosiphum violse, winged and wingless females and nymphs 44 



16. Diplosis violicola, adult r 48 



17. Peridroma saucia, moth, eggs, and larva 51 



18. Xoctua c-nigrum, moth and larva 54 



19. Prodenia commelinse, moth and larvae 60 



20. Lachnosterna arcuata, egg, larva, pupa, and beetle 75 



21. Agnotes mancus, beetle and larva 77 



22. Euptoieta claudia, different stages 80 



23. Penthina nimbatana, different stages 85 



24. Aramigus fulleri, different stages 89 



25. Hoplia callipyge, beetle 97 



26. Rhynch ites bicolor, beetle 99 



27. Trichius piger, beetle : 101 



28. Loxostege obliterdlis, different stages 104 



29. Sciara inconstans, different stages. 109 



6 



