| Chapter VI. Instinct And Discernment | 9764 |
| Chapter VII. Economy of Energy | 7382 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14572 |
| Chapter III. The Pine Processionary: The Procession | 16829 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9105 |
| Chapter VIII. The Pine Processionary | 6982 |
| Chapter XIV. The Cabbage Caterpillar | 11327 |
