| Chapter I. Bramble-Dwellers | 8416 |
| Chapter II. Experiments | 6550 |
| Chapter IV. More Enquiries Into Mason Bees | 8340 |
| Chapter V. The Story of My Cats | 6459 |
| Chapter VI. The Red Ants | 9713 |
| Chapter IX. The Theory of Parasitism | 6902 |
| Chapter VII. The Arbutus Caterpillar | 8840 |
| Chapter VIII. An Insect Virus | 7705 |
| Chapter XIX. A Memorable Lesson | 8779 |
| Chapter XX. Industrial Chemistry | 6414 |
| Chapter VI. The Burying Beetles: Experiments | 5545 |
| Making a Bug Home | 14214 |
