Internal anatomy of milkweed butterfly 23 43. Plan for folding net-ring 27 44. Insect-net 27 45. Plan for making a cheap net 27 46. Cyanide-jar 29 47. Paper cover for cyanide 29 48. Method of pinching a butterfly 30 49. Cheap form of breeding-cage 35 50. Breeding-cage 36 51. Butterfly in envelope 38 52. Method of making envelopes 38 53. Setting-board 39 54. Setting-block 39 55. Butterfly on setting-block 39 56. Setting-needle 40 57. Setting-board with moth upon it 40 58. Butterfly pinned on setting-board 41 59. Drying-box 41 60. Drying-box 42 61. Apparatus for inflating larvæ 45 62. Tip of inflating-tube 46 63. Drying-oven 46 64. Drying-oven 47 65. Detail drawing of book-box 48 66. Detail drawing of box 48 67. Detail drawing of box 49 68. Insect-box 49 69. Detail drawing of drawer for cabinet 51 70. Detail drawing for paper bottom of box to take place of cork 52 71. Manner of arranging specimens in cabinet or box 52 72. Naphthaline cone 53 73. Butterflies packed for shipment 55 74. Forceps 56 75. Forceps 57 76. Antennæ of butterfly 61 77. Antennæ of moths 62 78. Neuration of genus Anosia 81 79. Swarm of milkweed butterflies, photographed at night 83 80. Neuration of genus Mechanitis 86 81. Neuration of genus Ceratinia 88 82. Neuration of genus Dircenna 89 83. Fore leg of female Dircenna klugi 89 84.