| Chapter IV. The Mother Decides the sex of the egg | 5309 |
| Chapter V. Permutations of Sex | 5526 |
| Chapter I. The Terebinth Aphids. | 6154 |
| Chapter II. Experiments | 5814 |
| Chapter III. Exchanging The Nests | 4385 |
| Chapter IV. More Enquiries Into Mason Bees | 7702 |
| Chapter V. The Story of My Cats | 5894 |
| Chapter X. The Tribulations of The Mason Bee | 7051 |
| Making a Bug Home | 13390 |
