| Chapter IV. The Mother Decides the sex of the egg | 4378 |
| Chapter V. Permutations of Sex | 4581 |
| Chapter I. The Terebinth Aphids. | 5206 |
| Chapter II. Experiments | 4766 |
| Chapter III. Exchanging The Nests | 3559 |
| Chapter IV. More Enquiries Into Mason Bees | 6720 |
| Chapter V. The Story of My Cats | 4933 |
| Chapter X. The Tribulations of The Mason Bee | 5976 |
| Making a Bug Home | 12170 |
