| Chapter VI. Instinct And Discernment | 8859 |
| Chapter VII. Economy of Energy | 6642 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 12798 |
| Chapter III. The Pine Processionary: The Procession | 14425 |
| Chapter IV. The Pine Processionary: Meteoroogy | 8052 |
| Chapter VIII. The Pine Processionary | 6318 |
| Chapter XIV. The Cabbage Caterpillar | 10633 |
