| Chapter I. Bramble-Dwellers | 8694 |
| Chapter II. Experiments | 6876 |
| Chapter IV. More Enquiries Into Mason Bees | 8778 |
| Chapter V. The Story of My Cats | 6702 |
| Chapter VI. The Red Ants | 10068 |
| Chapter IX. The Theory of Parasitism | 7123 |
| Chapter VII. The Arbutus Caterpillar | 9099 |
| Chapter VIII. An Insect Virus | 7973 |
| Chapter XIX. A Memorable Lesson | 8988 |
| Chapter XX. Industrial Chemistry | 6647 |
| Chapter VI. The Burying Beetles: Experiments | 5916 |
| Making a Bug Home | 14496 |
