| Chapter I. Bramble-Dwellers | 7420 |
| Chapter II. Experiments | 5606 |
| Chapter IV. More Enquiries Into Mason Bees | 7505 |
| Chapter V. The Story of My Cats | 5688 |
| Chapter VI. The Red Ants | 8234 |
| Chapter IX. The Theory of Parasitism | 6135 |
| Chapter VII. The Arbutus Caterpillar | 7925 |
| Chapter VIII. An Insect Virus | 6749 |
| Chapter XIX. A Memorable Lesson | 8131 |
| Chapter XX. Industrial Chemistry | 5695 |
| Chapter VI. The Burying Beetles: Experiments | 4773 |
| Making a Bug Home | 13133 |
