| Chapter VI. Instinct And Discernment | 2275 |
| Chapter VII. Economy of Energy | 1840 |
| Chapter IX. The Cotton-Bees | 1735 |
| Chapter X. The Resin-Bees | 1250 |
| Chapter XI. The Poison of The Bee | 2763 |
| Chapter XIII. The Halicti: the Portress | 1120 |
| Chapter II. Experiments | 1632 |
| Chapter V. The Story of My Cats | 1755 |
| Chapter VI. The Red Ants | 1539 |
| Chapter VII. Some Reflections Upon Insect Psychology | 2982 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 1284 |
| Chapter III. The Pine Processionary: The Procession | 1483 |
| Chapter IV. The Pine Processionary: Meteoroogy | 2639 |
| Chapter VI. The Narbonne Lycosa: the Climbing-Instinct | 2849 |
| Chapter VII. The Spiders' Exodus | 1525 |
| Chapter I. The Harmas | 1466 |
| Chapter II. The Green Grasshopper | 9899 |
| Chapter III. The Empusa | 1603 |
| Chapter IV. The Capricorne | 1768 |
| Chapter V. The Burying Beetle: The Burying | 5696 |
| Chapter VI. The Burying Beetles: Experiments | 1305 |
| Chapter VII. The Bluebottle | 3559 |
| Chapter VIII. The Pine Processionary | 1200 |
| Chapter IX. The Spiders. The Narbonne Lycosa, or Black-Bellied Tarantula. The Burrow. | 1204 |
| Chapter X. The banded Epeira. Building the Web. | 1568 |
| Chapter XI. The Eumenes | 1980 |
| Chapter XII. The Osmiae. Their Habits | 1113 |
| Chapter XIII. The Glow-Worm | 5910 |
| Chapter XIV. The Cabbage Caterpillar | 2552 |
| Making a Bug Home | 3076 |