| Chapter IV. The Mother Decides the sex of the egg | 54 |
| Chapter V. Permutations of Sex | 56 |
| Chapter I. The Terebinth Aphids. | 56 |
| Chapter II. Experiments | 55 |
| Chapter III. Exchanging The Nests | 53 |
| Chapter IV. More Enquiries Into Mason Bees | 74 |
| Chapter V. The Story of My Cats | 46 |
| Chapter X. The Tribulations of The Mason Bee | 120 |
| Making a Bug Home | 56 |
