| Chapter IV. The Mother Decides the sex of the egg | 4055 |
| Chapter V. Permutations of Sex | 4256 |
| Chapter I. The Terebinth Aphids. | 4891 |
| Chapter II. Experiments | 4416 |
| Chapter III. Exchanging The Nests | 3279 |
| Chapter IV. More Enquiries Into Mason Bees | 6391 |
| Chapter V. The Story of My Cats | 4616 |
| Chapter X. The Tribulations of The Mason Bee | 5618 |
| Making a Bug Home | 11492 |
