| Chapter VI. Instinct And Discernment | 6635 |
| Chapter VII. Economy of Energy | 4588 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 9584 |
| Chapter III. The Pine Processionary: The Procession | 7956 |
| Chapter IV. The Pine Processionary: Meteoroogy | 5660 |
| Chapter VIII. The Pine Processionary | 3820 |
| Chapter XIV. The Cabbage Caterpillar | 8225 |
