| Chapter IV. The Mother Decides the sex of the egg | 5097 |
| Chapter V. Permutations of Sex | 5342 |
| Chapter I. The Terebinth Aphids. | 5959 |
| Chapter II. Experiments | 5606 |
| Chapter III. Exchanging The Nests | 4205 |
| Chapter IV. More Enquiries Into Mason Bees | 7505 |
| Chapter V. The Story of My Cats | 5688 |
| Chapter X. The Tribulations of The Mason Bee | 6810 |
| Making a Bug Home | 13133 |
