| Chapter VI. Instinct And Discernment | 9911 |
| Chapter VII. Economy of Energy | 7512 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14777 |
| Chapter III. The Pine Processionary: The Procession | 17091 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9252 |
| Chapter VIII. The Pine Processionary | 7114 |
| Chapter XIV. The Cabbage Caterpillar | 11464 |
