| Chapter I. Bramble-Dwellers | 2577 |
| Chapter II. Experiments | 2076 |
| Chapter IV. More Enquiries Into Mason Bees | 2644 |
| Chapter V. The Story of My Cats | 2219 |
| Chapter VI. The Red Ants | 2097 |
| Chapter IX. The Theory of Parasitism | 1765 |
| Chapter VII. The Arbutus Caterpillar | 2936 |
| Chapter VIII. An Insect Virus | 2080 |
| Chapter XIX. A Memorable Lesson | 4038 |
| Chapter XX. Industrial Chemistry | 1847 |
| Chapter VI. The Burying Beetles: Experiments | 1688 |
| Making a Bug Home | 4934 |
