| Chapter I. Bramble-Dwellers | 7402 |
| Chapter II. Experiments | 5589 |
| Chapter IV. More Enquiries Into Mason Bees | 7485 |
| Chapter V. The Story of My Cats | 5669 |
| Chapter VI. The Red Ants | 8215 |
| Chapter IX. The Theory of Parasitism | 6116 |
| Chapter VII. The Arbutus Caterpillar | 7908 |
| Chapter VIII. An Insect Virus | 6729 |
| Chapter XIX. A Memorable Lesson | 8119 |
| Chapter XX. Industrial Chemistry | 5682 |
| Chapter VI. The Burying Beetles: Experiments | 4758 |
| Making a Bug Home | 13113 |
