| Chapter IV. The Mother Decides the sex of the egg | 5039 |
| Chapter V. Permutations of Sex | 5284 |
| Chapter I. The Terebinth Aphids. | 5889 |
| Chapter II. Experiments | 5541 |
| Chapter III. Exchanging The Nests | 4148 |
| Chapter IV. More Enquiries Into Mason Bees | 7428 |
| Chapter V. The Story of My Cats | 5621 |
| Chapter X. The Tribulations of The Mason Bee | 6736 |
| Making a Bug Home | 13050 |
