| Chapter I. Bramble-Dwellers | 7655 |
| Chapter II. Experiments | 5814 |
| Chapter IV. More Enquiries Into Mason Bees | 7702 |
| Chapter V. The Story of My Cats | 5894 |
| Chapter VI. The Red Ants | 8645 |
| Chapter IX. The Theory of Parasitism | 6317 |
| Chapter VII. The Arbutus Caterpillar | 8153 |
| Chapter VIII. An Insect Virus | 6993 |
| Chapter XIX. A Memorable Lesson | 8294 |
| Chapter XX. Industrial Chemistry | 5883 |
| Chapter VI. The Burying Beetles: Experiments | 4947 |
| Making a Bug Home | 13390 |
