31. The stellio 31 32. The grasshopper: that it has neither mouth nor outlet for food _ib._ 33. The wings of insects 33 34. The beetle. The glow-worm. Other kinds of beetles 33 35. Locusts 35 36. Ants 37 37. The chrysalis 39 38. Animals which breed in wood 40 39. Insects that are parasites of man. Which is the smallest of animals? Animals found in wax even _ib._ 40. An animal which has no passage for the evacuations _ib._ 41. Moths, cantharides, gnats—an insect which breeds in the snow 41 42. An animal found in fire—the pyrallis, or pyrausta 42 43. The animal called hemerobion _ib._ 44. The nature and characteristics of all animals considered limb by limb. Those which have tufts and crests 43 45. The various kinds of horns. Animals in which they are moveable 44 46. The heads of animals. Those which have none 46 47. The hair _ib._ 48. The bones of the head 47 49. The brain _ib._ 50. The ears. Animals which hear without ears or apertures 48 51. The face, the forehead, and the eye-brows 49 52. The eyes—animals which have no eyes, or have only one eye _ib._ 53. The diversity of the colour of the eyes 50 54. The theory of sight—persons who can see by night _ib._ 55. The nature of the pupil—eyes which do not shut 52 56. The hair of the eye-lids; what animals are without them. Animals which can see on one side only 54 57. Animals which have no eye-lids 55 58. The cheeks _ib._ 59. The nostrils _ib._ 60. The mouth; the lips; the chin; and the jaw-bone 56 61. The teeth; the various kinds of teeth; in what animals they are not on both sides of the mouth: animals which have hollow teeth _ib._ 62. The teeth of serpents; their poison. A bird which has teeth 57 63. Wonderful circumstances connected with the teeth 59