18. How does the pupa-case change before the dragon-fly comes out?
19. Tell me how the pupa leaves the water when it is to change its state.
20. What can you say about the hooks on its feet?
21. In what way does the pupa get free of its case?
22. Tell me about the wings of the dragon-fly.
23. What care does it take of its wings?
24. How long does the dragon-fly live in the larva state?
25. How long does it live in the perfect state?
26. What can you say of the way the dragon-fly hunts insects?
27. What dragon-fly is called “The Little Lady”?