| Chapter I. Bramble-Dwellers | 7276 |
| Chapter II. Experiments | 5484 |
| Chapter IV. More Enquiries Into Mason Bees | 7375 |
| Chapter V. The Story of My Cats | 5565 |
| Chapter VI. The Red Ants | 8031 |
| Chapter IX. The Theory of Parasitism | 6023 |
| Chapter VII. The Arbutus Caterpillar | 7800 |
| Chapter VIII. An Insect Virus | 6595 |
| Chapter XIX. A Memorable Lesson | 8039 |
| Chapter XX. Industrial Chemistry | 5596 |
| Chapter VI. The Burying Beetles: Experiments | 4674 |
| Making a Bug Home | 12986 |
