| Chapter VI. Instinct And Discernment | 9960 |
| Chapter VII. Economy of Energy | 7543 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14905 |
| Chapter III. The Pine Processionary: The Procession | 17232 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9299 |
| Chapter VIII. The Pine Processionary | 7146 |
| Chapter XIV. The Cabbage Caterpillar | 11509 |
