| Chapter VI. Instinct And Discernment | 8967 |
| Chapter VII. Economy of Energy | 6757 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 13003 |
| Chapter III. The Pine Processionary: The Procession | 14821 |
| Chapter IV. The Pine Processionary: Meteoroogy | 8275 |
| Chapter VIII. The Pine Processionary | 6438 |
| Chapter XIV. The Cabbage Caterpillar | 10749 |
