| Chapter VI. Instinct And Discernment | 9376 |
| Chapter VII. Economy of Energy | 7091 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 13744 |
| Chapter III. The Pine Processionary: The Procession | 15899 |
| Chapter IV. The Pine Processionary: Meteoroogy | 8738 |
| Chapter VIII. The Pine Processionary | 6709 |
| Chapter XIV. The Cabbage Caterpillar | 11051 |
