| Chapter VI. Instinct And Discernment | 6562 |
| Chapter VII. Economy of Energy | 4495 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 9438 |
| Chapter III. The Pine Processionary: The Procession | 7759 |
| Chapter IV. The Pine Processionary: Meteoroogy | 5584 |
| Chapter VIII. The Pine Processionary | 3724 |
| Chapter XIV. The Cabbage Caterpillar | 8064 |
