DUBLIN,

_July_, 1913.




CONTENTS

CHAP. PAGE

I. Introduction 1

II. Growth and Change 8

III. The Life-stories of some Sucking Insects 16

IV. From Water to Air 23

V. Transformations, Outward and Inward 35

VI. Larvae and their Adaptations 49

VII. Pupae and their Modifications 79

VIII. The Life-story and the Seasons 89

IX. Past and Present--the Meaning of the Story 105