| Chapter VI. Instinct And Discernment | 9965 |
| Chapter VII. Economy of Energy | 7549 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14913 |
| Chapter III. The Pine Processionary: The Procession | 17244 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9302 |
| Chapter VIII. The Pine Processionary | 7149 |
| Chapter XIV. The Cabbage Caterpillar | 11514 |
