| Chapter VI. Instinct And Discernment | 1327 |
| Chapter VII. Economy of Energy | 1165 |
| Chapter IX. The Cotton-Bees | 1077 |
| Chapter X. The Resin-Bees | 722 |
| Chapter XI. The Poison of The Bee | 1947 |
| Chapter XIII. The Halicti: the Portress | 703 |
| Chapter II. Experiments | 1060 |
| Chapter V. The Story of My Cats | 1163 |
| Chapter VI. The Red Ants | 960 |
| Chapter VII. Some Reflections Upon Insect Psychology | 1453 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 782 |
| Chapter III. The Pine Processionary: The Procession | 881 |
| Chapter IV. The Pine Processionary: Meteoroogy | 1581 |
| Chapter VI. The Narbonne Lycosa: the Climbing-Instinct | 1744 |
| Chapter VII. The Spiders' Exodus | 913 |
| Chapter I. The Harmas | 954 |
| Chapter II. The Green Grasshopper | 3387 |
| Chapter III. The Empusa | 955 |
| Chapter IV. The Capricorne | 1257 |
| Chapter V. The Burying Beetle: The Burying | 3316 |
| Chapter VI. The Burying Beetles: Experiments | 788 |
| Chapter VII. The Bluebottle | 2224 |
| Chapter VIII. The Pine Processionary | 721 |
| Chapter IX. The Spiders. The Narbonne Lycosa, or Black-Bellied Tarantula. The Burrow. | 680 |
| Chapter X. The banded Epeira. Building the Web. | 800 |
| Chapter XI. The Eumenes | 1100 |
| Chapter XII. The Osmiae. Their Habits | 667 |
| Chapter XIII. The Glow-Worm | 3009 |
| Chapter XIV. The Cabbage Caterpillar | 1258 |
| Making a Bug Home | 1700 |