| Chapter I. Bramble-Dwellers | 7600 |
| Chapter II. Experiments | 5756 |
| Chapter IV. More Enquiries Into Mason Bees | 7649 |
| Chapter V. The Story of My Cats | 5840 |
| Chapter VI. The Red Ants | 8527 |
| Chapter IX. The Theory of Parasitism | 6275 |
| Chapter VII. The Arbutus Caterpillar | 8097 |
| Chapter VIII. An Insect Virus | 6941 |
| Chapter XIX. A Memorable Lesson | 8250 |
| Chapter XX. Industrial Chemistry | 5828 |
| Chapter VI. The Burying Beetles: Experiments | 4899 |
| Making a Bug Home | 13317 |
