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. Ly thrum sal icaria ..................... 30 



34. Knautia dipsacifolia. (After Kerner) .......... 38 



35. LinivKa 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- j> .......... 127 



- 5) )J )> .......... 



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 



