| Chapter I. Bramble-Dwellers | 7984 |
| Chapter II. Experiments | 6106 |
| Chapter IV. More Enquiries Into Mason Bees | 8002 |
| Chapter V. The Story of My Cats | 6158 |
| Chapter VI. The Red Ants | 9086 |
| Chapter IX. The Theory of Parasitism | 6583 |
| Chapter VII. The Arbutus Caterpillar | 8465 |
| Chapter VIII. An Insect Virus | 7310 |
| Chapter XIX. A Memorable Lesson | 8521 |
| Chapter XX. Industrial Chemistry | 6138 |
| Chapter VI. The Burying Beetles: Experiments | 5201 |
| Making a Bug Home | 13788 |
