| Chapter I. Bramble-Dwellers | 8751 |
| Chapter II. Experiments | 6945 |
| Chapter IV. More Enquiries Into Mason Bees | 8831 |
| Chapter V. The Story of My Cats | 6748 |
| Chapter VI. The Red Ants | 10130 |
| Chapter IX. The Theory of Parasitism | 7168 |
| Chapter VII. The Arbutus Caterpillar | 9153 |
| Chapter VIII. An Insect Virus | 8020 |
| Chapter XIX. A Memorable Lesson | 9020 |
| Chapter XX. Industrial Chemistry | 6693 |
| Chapter VI. The Burying Beetles: Experiments | 5964 |
| Making a Bug Home | 14555 |
