| Chapter IV. The Mother Decides the sex of the egg | 4228 |
| Chapter V. Permutations of Sex | 4432 |
| Chapter I. The Terebinth Aphids. | 5060 |
| Chapter II. Experiments | 4587 |
| Chapter III. Exchanging The Nests | 3424 |
| Chapter IV. More Enquiries Into Mason Bees | 6567 |
| Chapter V. The Story of My Cats | 4785 |
| Chapter X. The Tribulations of The Mason Bee | 5795 |
| Making a Bug Home | 11841 |
