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 ". larv;e 48 



IV. Prodenia commelinn', eudiopta and orn'dhogalU 58 



FIGURES. 



Fig. 1. Pldyctscnia rublgalis in different stages 8 



2. Fionea ferrugalis, venation of wings 8 



3. Lo.vostege similalis, 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. Empligtus canadensis, female, larva, pupa, and cocoon 27 



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



larvte in different stages, and adult at rest 28 



9. Tetrartychus hitnaculatus, adult 36 



10. Tetranychns himaculatns, palpus 36 



11. Tetranychus bimaculatus, claws 36 



1 2. Hand sprayer 41 



1 3. Parts of hand sprayer 41 



1 4. Tif) and greenhouse nozzle 42 



15. Ilhopalosiphum riolte, wdnged and w'ingless females and nymphs 44 



16. Diplosis vioUcola, adult 48 



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



18. Noctua c-nigrum, moth and larva 54 



19. Prodenia commelinse, moth and larvpe 60 



20. Lachnosterna arcuata, egg, larva, puj^a, and beetle 75 



21. Agriotes mancus, beetle and larva 77 



22. Euptoieta cluudia, different stages 80 



23. Penthiua nimbatana, different stages 85 



24. Aramigus fidleri, different stages 89 



25. Iloplia callipyge, beetle 97 



26. Rhynchites bicolor, beetle ■ 99 



27. Trichins piger, beetle 101 



28. Lo.vostege obliferaJis, different stages 104 



29. Sciara inconsfans, different stages 109 



6 



