| Chapter VI. Instinct And Discernment | 2874 |
| Chapter VII. Economy of Energy | 2384 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 1905 |
| Chapter III. The Pine Processionary: The Procession | 2572 |
| Chapter IV. The Pine Processionary: Meteoroogy | 3432 |
| Chapter VIII. The Pine Processionary | 1840 |
| Chapter XIV. The Cabbage Caterpillar | 3913 |
