xviii 
LIST OF ILLUSTRATIONS. 
FIG. 
40. The Trachea of an Insect [2]. 
41. Cockroach and Cast Skin [1]. 
42. The Nervous Chain of a Cockroach [1]. 
43. Portion of the Cornea of a Fly’s Compound Eye [1] 
44. The Hearing Organ of a Cricket [1]. 
45. The Stridulating Organ of a Cricket [1]. 
46. Antennae of Lepidoptera [4]. 
47. Eggs of Lepidoptera [4]. 
48. Some Larvae of Lepidoptera. 
49. Some Cocoons and Chrysalids [4]. 
50. A Cabbage-butterfly. 
51. Head of a Moth. 
52. The Kallima. 
53. Catocala Nupta [4]. 
54. The Milkweed-butterfly. 
55. Limenitis Ursula. 
56a. Moth at Rest. 
56A Butterfly at Rest. 
57. Larva and Pupa of the House-fly [1]. 
58. Right Winglet of Bluebottle [1]. 
59. Balancer of Bluebottle [1]. 
60. Portion of a Fly’s Foot [1]. 
61. Side View of Proboscis, partly opened [1]. 
62. Head of Bluebottle [1]. 
63. Eggs of Milkweed-butterfly. 
64. Larva of Milkweed-butterfly. 
65. Pupa of Milkweed-butterfly. 
66. Female and Male Aphis. 
67. A Microgaster Fly. 
68. The Dragon-fly [2]. 
69. The Imago of a Dragon-fly [2]. 
70. Caddis-fly, Adult and Larval Cases [2]. 
71. The Growth of a May-fly [2]. 
72. A Water-boatman. 
73. Dyticus Marginalis. 
74. Mouth of a Bug. 
75. The Egg-raft of a Mosquito [3]. 
76. The Life-history of a Mosquito. 
77. The Mouth of a Female Mosquito [2J. 
78. The Leg of a Cockroach [1]. 
79. A Mole-cricket. 
80. Fore Legs of a Water-bug [2]. 
81. Legs of Dyticus [2]. 
82. Fore Leg of a Butterfly [4]. 
83. Ilive-bees. 
84. Fertilization of a Flower by an Insect. 
85. A Spider’s Leg [2]. 
86. Water-spider and Nest. 
87. Side View of Crayfish [5]. 
88. Dorsal View of Crayfish [5]. 
89. Ventral View of Crayfish [5]. 
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