| Chapter IV. The Mother Decides the sex of the egg | 6656 |
| Chapter V. Permutations of Sex | 6711 |
| Chapter I. The Terebinth Aphids. | 7367 |
| Chapter II. Experiments | 7393 |
| Chapter III. Exchanging The Nests | 5807 |
| Chapter IV. More Enquiries Into Mason Bees | 9298 |
| Chapter V. The Story of My Cats | 7054 |
| Chapter X. The Tribulations of The Mason Bee | 8419 |
| Making a Bug Home | 15052 |
