| Chapter VI. Instinct And Discernment | 7508 |
| Chapter VII. Economy of Energy | 5412 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 10802 |
| Chapter III. The Pine Processionary: The Procession | 10694 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6365 |
| Chapter VIII. The Pine Processionary | 5042 |
| Chapter XIV. The Cabbage Caterpillar | 9401 |
