| Chapter I. Bramble-Dwellers | 7828 |
| Chapter II. Experiments | 5957 |
| Chapter IV. More Enquiries Into Mason Bees | 7833 |
| Chapter V. The Story of My Cats | 6009 |
| Chapter VI. The Red Ants | 8868 |
| Chapter IX. The Theory of Parasitism | 6439 |
| Chapter VII. The Arbutus Caterpillar | 8299 |
| Chapter VIII. An Insect Virus | 7138 |
| Chapter XIX. A Memorable Lesson | 8404 |
| Chapter XX. Industrial Chemistry | 6005 |
| Chapter VI. The Burying Beetles: Experiments | 5071 |
| Making a Bug Home | 13549 |
