| Chapter VI. Instinct And Discernment | 10053 |
| Chapter VII. Economy of Energy | 7615 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 15099 |
| Chapter III. The Pine Processionary: The Procession | 17515 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9384 |
| Chapter VIII. The Pine Processionary | 7215 |
| Chapter XIV. The Cabbage Caterpillar | 11594 |
