| Chapter VI. Instinct And Discernment | 9899 |
| Chapter VII. Economy of Energy | 7499 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14754 |
| Chapter III. The Pine Processionary: The Procession | 17064 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9237 |
| Chapter VIII. The Pine Processionary | 7103 |
| Chapter XIV. The Cabbage Caterpillar | 11454 |
