| Chapter I. Bramble-Dwellers | 7140 |
| Chapter II. Experiments | 5362 |
| Chapter IV. More Enquiries Into Mason Bees | 7281 |
| Chapter V. The Story of My Cats | 5468 |
| Chapter VI. The Red Ants | 7823 |
| Chapter IX. The Theory of Parasitism | 5934 |
| Chapter VII. The Arbutus Caterpillar | 7705 |
| Chapter VIII. An Insect Virus | 6482 |
| Chapter XIX. A Memorable Lesson | 7953 |
| Chapter XX. Industrial Chemistry | 5514 |
| Chapter VI. The Burying Beetles: Experiments | 4594 |
| Making a Bug Home | 12842 |
