| Chapter VI. Instinct And Discernment | 7693 |
| Chapter VII. Economy of Energy | 5573 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 11144 |
| Chapter III. The Pine Processionary: The Procession | 11373 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6591 |
| Chapter VIII. The Pine Processionary | 5268 |
| Chapter XIV. The Cabbage Caterpillar | 9625 |
