| Chapter VI. Instinct And Discernment | 936 |
| Chapter VII. Economy of Energy | 837 |
| Chapter IX. The Cotton-Bees | 813 |
| Chapter X. The Resin-Bees | 572 |
| Chapter XI. The Poison of The Bee | 1618 |
| Chapter XIII. The Halicti: the Portress | 554 |
| Chapter II. Experiments | 873 |
| Chapter V. The Story of My Cats | 908 |
| Chapter VI. The Red Ants | 772 |
| Chapter VII. Some Reflections Upon Insect Psychology | 989 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 628 |
| Chapter III. The Pine Processionary: The Procession | 730 |
| Chapter IV. The Pine Processionary: Meteoroogy | 1169 |
| Chapter VI. The Narbonne Lycosa: the Climbing-Instinct | 1224 |
| Chapter VII. The Spiders' Exodus | 745 |
| Chapter I. The Harmas | 766 |
| Chapter II. The Green Grasshopper | 2191 |
| Chapter III. The Empusa | 763 |
| Chapter IV. The Capricorne | 1071 |
| Chapter V. The Burying Beetle: The Burying | 2412 |
| Chapter VI. The Burying Beetles: Experiments | 621 |
| Chapter VII. The Bluebottle | 1641 |
| Chapter VIII. The Pine Processionary | 582 |
| Chapter IX. The Spiders. The Narbonne Lycosa, or Black-Bellied Tarantula. The Burrow. | 536 |
| Chapter X. The banded Epeira. Building the Web. | 553 |
| Chapter XI. The Eumenes | 797 |
| Chapter XII. The Osmiae. Their Habits | 522 |
| Chapter XIII. The Glow-Worm | 1768 |
| Chapter XIV. The Cabbage Caterpillar | 837 |
| Making a Bug Home | 1209 |