CONTENTS. 



Page 



Introduction 1 



Elucidation of the Cases hitherto described as Parthenogenesis . . 12 



True Parthenogenesis in some Sac-bearing Lepidoptera 24 



True Parthenogenesis in the Honey-Bee 38 



True Parthenogenesis in the Silk-worm Moth 92 



Concluding Remarks 1 04 



Explanation of the Figures 109 



