b ILLUSTRATIONS. 
Page. 
Fig. 20. Macroham unicolor: beetle 25 
21. Macrobasis albida: beetle 26 
22. Cantharis nuttalli: beetle 27 
23. JEpicserus imbricatus: beetle, eggs, and larva 28 
24. Epicserus imbricatus: beetle attacked by fungus 29 
25. Peridroma margaritosa: moth, eggs, and larva 30 
26. Agrotis ypsilon: moth and larva 31 
27. Noctua c-nigrum: moth and larva 31 
28. Chorizagrotis agrestis: moth and larva 32 
29. Prodenia ornithogalli: male and female moths 33 
30. Prodenia ornithogalli: pale and dark forms of larva 33 
31. JEuphrocera daripennis: fly, antenna, and puparium 34 
32. Caradrina exigua: moth, egg, and larva 37 
33. Caradrina exigua: enlarged section of larva 37 
34. Loxostege sticticalis: moth and larva 38 
35. Agathis vulgaris: parasitic enemy of sugar-beet web- worm 39 
36. Loxostege similalis: moth, larva, and pupa 39 
37. Limneria eurycreontis: parasitic enemy of garden web- worm 40 
38. Deilephila lineata: moth, larva, and pupa 41 
39. Mamestra picta: moth, larva, and pupa 42 
40. Mamestra picta: larval stages 42 
41. Leucarctia acrsea: moth and larva 43 
42. Isia isabella: moth and caterpillar 44 
43. Melanoplusfemur-rubrum: adult 46 
44. Melanoplus spretus: females laying eggs 46 
45. Melanoplus spretus: nymphs 46 
46. Melanoplus differentialis: adult 47 
47. Melanoplus bivittatus: adult 47 
48. A simple coal-tar pan to be drawn by hand 48 
49. A canvas hopperdozer to be drawn by horse 48 
50. Pegomya vicina: fly, egg, maggot, and puparium , 51 
51. Lygus pratensis: adult and last nymph stage 53 
52. Lygus pratensis: nymph stages 53 
53. JSPysius angustatus: adult, nymph, and punctured leaf 55 
54. Halticus uhleri: male and female bugs ^ 56 
55. Empoasca flavescens: adult 57 
56. Head of plant-louse showing sucking beak 58 
57. Aphis gossypii: adult females and nymphs 58 
58. Hippodamia convergens: adult, pupa, and larva 59 
59. Lachnosterna arcuata: beetle, pupa, larva, and egg 63 
60. Ligyrus gibbosus: beetle 65 
61. Agrlotes mancus: beetle and larva 67 
62. Monocrepidius vespertinus: beetle, larva, and pupa 67 
63. Dactylopius citri: adult female 68 
64. Pegomya fusdceps: male and female fly, larva, and pupa 69 
65. Tetranychus bimaciUatus: adult and details 71 
