| Chapter I. Bramble-Dwellers | 4942 |
| Chapter II. Experiments | 3734 |
| Chapter IV. More Enquiries Into Mason Bees | 4840 |
| Chapter V. The Story of My Cats | 4005 |
| Chapter VI. The Red Ants | 5234 |
| Chapter IX. The Theory of Parasitism | 4249 |
| Chapter VII. The Arbutus Caterpillar | 5799 |
| Chapter VIII. An Insect Virus | 4530 |
| Chapter XIX. A Memorable Lesson | 6515 |
| Chapter XX. Industrial Chemistry | 4014 |
| Chapter VI. The Burying Beetles: Experiments | 3171 |
| Making a Bug Home | 9675 |
