FIG. PAGE 1. Egg of Basilarchia disippus, magnified 3 2. Egg of Basilarchia disippus, natural size 3 3. Egg of Papilio turnus, enlarged 4 4. Egg of Anosia plexippus, magnified 4 5. Egg of Anosia plexippus, natural size 4 6. Egg of Anthocharis genutia, magnified 4 7. Egg of Lycæna pseudargiolus, magnified 4 8. Egg of Melitæa phaëton, magnified 4 9. Micropyle of egg of Pieris oleracea, magnified 5 10. Eggs of Grapta comma, magnified 5 11. Eggs of Vanessa antiopa, magnified 5 12. Caterpillar of Papilio philenor 6 13. Head of caterpillar of Papilio asterias, magnified 6 14. Head of caterpillar of Anosia plexippus, magnified 6 15. Head of caterpillar of Anosia plexippus, side view, enlarged 7 16. Caterpillar of Anosia plexippus, natural size 7 17. Fore leg of caterpillar of Vanessa antiopa, enlarged 7 18. Anterior segments of caterpillar of A. plexippus 7 19. Proleg of caterpillar of Vanessa antiopa, enlarged 7 20. Caterpillar of Basilarchia disippus 8 21. Early stages of goatweed butterfly 9 22. Head of caterpillar of Papilio troilus 9 23. Caterpillar of milkweed butterfly changing into chrysalis 11 24. Chrysalis of milkweed butterfly 12 25. Chrysalis of Papilio philenor 12 26. Caterpillar and chrysalis of Pieris protodice 12 27. Chrysalis of Pieris oleracea 13 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.