| Chapter I. Bramble-Dwellers | 9206 |
| Chapter II. Experiments | 7393 |
| Chapter IV. More Enquiries Into Mason Bees | 9298 |
| Chapter V. The Story of My Cats | 7054 |
| Chapter VI. The Red Ants | 11091 |
| Chapter IX. The Theory of Parasitism | 7460 |
| Chapter VII. The Arbutus Caterpillar | 9449 |
| Chapter VIII. An Insect Virus | 8405 |
| Chapter XIX. A Memorable Lesson | 9254 |
| Chapter XX. Industrial Chemistry | 6934 |
| Chapter VI. The Burying Beetles: Experiments | 6360 |
| Making a Bug Home | 15052 |
