xiv LIST OF ILLUSTRATIONS. 



FIG. PAGE 



30. Terminal portion of Fig. 29 more magnified 26 



31. Primula (long-styled form) 28 



32. (short-styled form) 28 



33. Lythrum salicaria 30 



34. Knautia dipsacifolia. (After Kerner) 38 



35. Linncea borealis, flower of. ( ) 39 



36. Carlina vulgaris. ( ) 39 



37. Silene nutans. ( ) 40 



38. Larva of Arge galathea 47 



39. Larva of Smerinthus ocellatus 48 



40. Larva of Chcerocampa elpenor. First Stage 54 



41. Second Stage 54 



42. Just before second moult .... 54 



43. Third Stage 55 



44. Fourth Stage 55 



45. Fifth Stage 56 



46. Full-grown (natural size) .... 56 



47. Chcerocampa porcellus 60 



48. Aphis 72 



49. Contrivance for testing sagacity of Ants 117 



50. 126 



51. 127 



52. 127 



53. 128 



54 128 



55. Flint Implement from St. Acheul, near Amiens. Natural Size . 149 



56. . 150 



57. Section of Fig. 56, showing discolouration of surface 151 



PLATES 



Ancient Coins, Plates I and II To face 191 



