| Chapter I. Bramble-Dwellers | 7706 |
| Chapter II. Experiments | 5850 |
| Chapter IV. More Enquiries Into Mason Bees | 7740 |
| Chapter V. The Story of My Cats | 5932 |
| Chapter VI. The Red Ants | 8709 |
| Chapter IX. The Theory of Parasitism | 6351 |
| Chapter VII. The Arbutus Caterpillar | 8198 |
| Chapter VIII. An Insect Virus | 7042 |
| Chapter XIX. A Memorable Lesson | 8329 |
| Chapter XX. Industrial Chemistry | 5915 |
| Chapter VI. The Burying Beetles: Experiments | 4982 |
| Making a Bug Home | 13433 |
