| Chapter I. Bramble-Dwellers | 6908 |
| Chapter II. Experiments | 5169 |
| Chapter IV. More Enquiries Into Mason Bees | 7108 |
| Chapter V. The Story of My Cats | 5297 |
| Chapter VI. The Red Ants | 7510 |
| Chapter IX. The Theory of Parasitism | 5771 |
| Chapter VII. The Arbutus Caterpillar | 7534 |
| Chapter VIII. An Insect Virus | 6296 |
| Chapter XIX. A Memorable Lesson | 7803 |
| Chapter XX. Industrial Chemistry | 5343 |
| Chapter VI. The Burying Beetles: Experiments | 4440 |
| Making a Bug Home | 12606 |
