| Chapter I. Bramble-Dwellers | 8591 |
| Chapter II. Experiments | 6754 |
| Chapter IV. More Enquiries Into Mason Bees | 8642 |
| Chapter V. The Story of My Cats | 6607 |
| Chapter VI. The Red Ants | 9939 |
| Chapter IX. The Theory of Parasitism | 7039 |
| Chapter VII. The Arbutus Caterpillar | 8999 |
| Chapter VIII. An Insect Virus | 7868 |
| Chapter XIX. A Memorable Lesson | 8906 |
| Chapter XX. Industrial Chemistry | 6551 |
| Chapter VI. The Burying Beetles: Experiments | 5784 |
| Making a Bug Home | 14397 |
