| Chapter VI. Instinct And Discernment | 10261 |
| Chapter VII. Economy of Energy | 7751 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 15304 |
| Chapter III. The Pine Processionary: The Procession | 18053 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9494 |
| Chapter VIII. The Pine Processionary | 7318 |
| Chapter XIV. The Cabbage Caterpillar | 11710 |
