| Chapter I. Bramble-Dwellers | 6231 |
| Chapter II. Experiments | 4642 |
| Chapter IV. More Enquiries Into Mason Bees | 6606 |
| Chapter V. The Story of My Cats | 4826 |
| Chapter VI. The Red Ants | 6515 |
| Chapter IX. The Theory of Parasitism | 5397 |
| Chapter VII. The Arbutus Caterpillar | 7049 |
| Chapter VIII. An Insect Virus | 5812 |
| Chapter XIX. A Memorable Lesson | 7389 |
| Chapter XX. Industrial Chemistry | 4907 |
| Chapter VI. The Burying Beetles: Experiments | 3992 |
| Making a Bug Home | 11919 |
