| Chapter VI. Instinct And Discernment | 10452 |
| Chapter VII. Economy of Energy | 7880 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 15498 |
| Chapter III. The Pine Processionary: The Procession | 18851 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9646 |
| Chapter VIII. The Pine Processionary | 7464 |
| Chapter XIV. The Cabbage Caterpillar | 11858 |
