13. Mounted Needles 25 14. Cape Peripatus (natural size) 30 15. Margined Water Beetle (male) 32 16. Shells of Molluscs broken up by Dytiscus 33 17. Outline of Dytiscus 38 18. Male Dytiscus in flight 39 19. To show fold of (right) wing of Dytiscus 40 20. To show fold of (right) wing of Dytiscus 40 21 and 21 A. Head of Dytiscus 42 22. Disposition of mouth parts 43 23. Leg of Cockroach 44 24. Tarsus of Dytiscus (magnified) 45 25. Female Dytiscus swimming 46 26. Upper surface of abdomen of typical Beetle 47 27. Spiracle of Dytiscus (magnified) 48 28. Tracheal tubes of Dytiscus (magnified) 48 29. Great Water Beetle 51 30. Female Hydrophilus constructing a cocoon. (After Lyonnet) 55 31. Cocktail Beetle 58 32. Cockroaches 66 33. Mouth parts of a Cockroach 69 34. Cockroach, showing Spiracles 71 35. Alimentary Canal of Cockroach 73 36. American Cockroach (male) 75 37. Larva and Pupa of Earwig 77 38. Earwig (male) 78 39. Great Green Grasshopper (female) 81 40. Tibial ear of Great Green Grasshopper 85 41. Land Bug (magnified) 86 42. Water Scorpion 87 43. Organs of Water Scorpion, Egg, and Parasitic Mite. (After Swammerdam) 90 44. Raptorial leg of Water Scorpion 92 45. Water Boatman 93 46. Water Boatman swimming 94 47. Corixa, with wings expanded 95 48. Scheme of under surface of Wolf Spider (female). Pedipalp of male (enlarged) 98 49. Garden Spider and Web 99 50. Threads of Spider’s Web 100 51. Anchorage of Web 101 52. Foot of Garden Spider 104