| Chapter I. Bramble-Dwellers | 5946 |
| Chapter II. Experiments | 4416 |
| Chapter IV. More Enquiries Into Mason Bees | 6391 |
| Chapter V. The Story of My Cats | 4616 |
| Chapter VI. The Red Ants | 6258 |
| Chapter IX. The Theory of Parasitism | 5042 |
| Chapter VII. The Arbutus Caterpillar | 6804 |
| Chapter VIII. An Insect Virus | 5546 |
| Chapter XIX. A Memorable Lesson | 7188 |
| Chapter XX. Industrial Chemistry | 4691 |
| Chapter VI. The Burying Beetles: Experiments | 3793 |
| Making a Bug Home | 11492 |
