| Chapter IV. The Mother Decides the sex of the egg | 6175 |
| Chapter V. Permutations of Sex | 6416 |
| Chapter I. The Terebinth Aphids. | 6975 |
| Chapter II. Experiments | 6876 |
| Chapter III. Exchanging The Nests | 5353 |
| Chapter IV. More Enquiries Into Mason Bees | 8778 |
| Chapter V. The Story of My Cats | 6702 |
| Chapter X. The Tribulations of The Mason Bee | 8012 |
| Making a Bug Home | 14496 |
