| Chapter I. Bramble-Dwellers | 1052 |
| Chapter II. Experiments | 1060 |
| Chapter IV. More Enquiries Into Mason Bees | 1312 |
| Chapter V. The Story of My Cats | 1163 |
| Chapter VI. The Red Ants | 960 |
| Chapter IX. The Theory of Parasitism | 798 |
| Chapter VII. The Arbutus Caterpillar | 1409 |
| Chapter VIII. An Insect Virus | 1029 |
| Chapter XIX. A Memorable Lesson | 1445 |
| Chapter XX. Industrial Chemistry | 1006 |
| Chapter VI. The Burying Beetles: Experiments | 788 |
| Making a Bug Home | 1700 |
