| Chapter IV. The Mother Decides the sex of the egg | 5595 |
| Chapter V. Permutations of Sex | 5790 |
| Chapter I. The Terebinth Aphids. | 6419 |
| Chapter II. Experiments | 6106 |
| Chapter III. Exchanging The Nests | 4642 |
| Chapter IV. More Enquiries Into Mason Bees | 8002 |
| Chapter V. The Story of My Cats | 6158 |
| Chapter X. The Tribulations of The Mason Bee | 7352 |
| Making a Bug Home | 13788 |
