| Chapter I. Bramble-Dwellers | 7006 |
| Chapter II. Experiments | 5249 |
| Chapter IV. More Enquiries Into Mason Bees | 7192 |
| Chapter V. The Story of My Cats | 5370 |
| Chapter VI. The Red Ants | 7647 |
| Chapter IX. The Theory of Parasitism | 5841 |
| Chapter VII. The Arbutus Caterpillar | 7612 |
| Chapter VIII. An Insect Virus | 6364 |
| Chapter XIX. A Memorable Lesson | 7867 |
| Chapter XX. Industrial Chemistry | 5414 |
| Chapter VI. The Burying Beetles: Experiments | 4508 |
| Making a Bug Home | 12705 |
