List of Illustrations in Text 
FIG. PAGE 
28. Butterfly emerging from chrysalis.13 
29. Head of milkweed butterfly, showing parts .... 14 
30. Cross-section of sucking-tube of butterfly .... 15 
31. Longitudinal section of the head of the milkweed 
butterfly.15 
32. Interior structure of head of milkweed butterfly ... 16 
33. Labial palpus of butterfly.16 
34. Legs of butterfly.17 
35. Parts of leg of butterfly.17 
36. Scales on wing of butterfly. 18 
37. Androconia from wing of butterfly.18 
38. Outline of wing of butterfly.20 
39. Arrangement of scales on the wing of a butterfly . . 20 
40. Figure of wing, showing names of veins . . . . 21 
41. Internal anatomy of caterpillar of milkweed butterfly . 22 
42. Internal anatomy of milkweed butterfly.23 
43. Plan for folding net-ring. 27 
44. Insect-net.27 
43. 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 
31. Butterfly in envelope ..38 
52. Method of making envelopes.38 
53. Setting-board. ... 39 
34. Setting-block...39 
33. 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 larvae ......... 45 
62. Tip of inflating-tube.46 
63. Drying-oven.46 
64. Drying-oven.47 
63. Detail drawing of book-box.48 
66. Detail drawing of box . . , ... , 48 
xiv 
