| Chapter VI. Instinct And Discernment | 2874 |
| Chapter VII. Economy of Energy | 2384 |
| Chapter IX. The Cotton-Bees | 2248 |
| Chapter X. The Resin-Bees | 1736 |
| Chapter XI. The Poison of The Bee | 3412 |
| Chapter XIII. The Halicti: the Portress | 1523 |
| Chapter II. Experiments | 2076 |
| Chapter V. The Story of My Cats | 2219 |
| Chapter VI. The Red Ants | 2097 |
| Chapter VII. Some Reflections Upon Insect Psychology | 3725 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 1902 |
| Chapter III. The Pine Processionary: The Procession | 2570 |
| Chapter IV. The Pine Processionary: Meteoroogy | 3427 |
| Chapter VI. The Narbonne Lycosa: the Climbing-Instinct | 3471 |
| Chapter VII. The Spiders' Exodus | 2120 |
| Chapter I. The Harmas | 1820 |
| Chapter II. The Green Grasshopper | 12805 |
| Chapter III. The Empusa | 1990 |
| Chapter IV. The Capricorne | 2152 |
| Chapter V. The Burying Beetle: The Burying | 8661 |
| Chapter VI. The Burying Beetles: Experiments | 1688 |
| Chapter VII. The Bluebottle | 4400 |
| Chapter VIII. The Pine Processionary | 1835 |
| Chapter IX. The Spiders. The Narbonne Lycosa, or Black-Bellied Tarantula. The Burrow. | 1597 |
| Chapter X. The banded Epeira. Building the Web. | 2135 |
| Chapter XI. The Eumenes | 2750 |
| Chapter XII. The Osmiae. Their Habits | 1468 |
| Chapter XIII. The Glow-Worm | 7570 |
| Chapter XIV. The Cabbage Caterpillar | 3909 |
| Making a Bug Home | 4934 |