| Chapter IV. The Mother Decides the sex of the egg | 5081 |
| Chapter V. Permutations of Sex | 5325 |
| Chapter I. The Terebinth Aphids. | 5936 |
| Chapter II. Experiments | 5589 |
| Chapter III. Exchanging The Nests | 4186 |
| Chapter IV. More Enquiries Into Mason Bees | 7485 |
| Chapter V. The Story of My Cats | 5669 |
| Chapter X. The Tribulations of The Mason Bee | 6793 |
| Making a Bug Home | 13113 |
