| Chapter IV. The Mother Decides the sex of the egg | 4215 |
| Chapter V. Permutations of Sex | 4433 |
| Chapter I. The Terebinth Aphids. | 5026 |
| Chapter II. Experiments | 4569 |
| Chapter III. Exchanging The Nests | 3405 |
| Chapter IV. More Enquiries Into Mason Bees | 6563 |
| Chapter V. The Story of My Cats | 4780 |
| Chapter X. The Tribulations of The Mason Bee | 5783 |
| Making a Bug Home | 11770 |
