| Chapter I. Bramble-Dwellers | 7559 |
| Chapter II. Experiments | 5725 |
| Chapter IV. More Enquiries Into Mason Bees | 7620 |
| Chapter V. The Story of My Cats | 5809 |
| Chapter VI. The Red Ants | 8461 |
| Chapter IX. The Theory of Parasitism | 6243 |
| Chapter VII. The Arbutus Caterpillar | 8058 |
| Chapter VIII. An Insect Virus | 6906 |
| Chapter XIX. A Memorable Lesson | 8228 |
| Chapter XX. Industrial Chemistry | 5802 |
| Chapter VI. The Burying Beetles: Experiments | 4869 |
| Making a Bug Home | 13281 |
