| Chapter IV. The Mother Decides the sex of the egg | 4497 |
| Chapter V. Permutations of Sex | 4732 |
| Chapter I. The Terebinth Aphids. | 5309 |
| Chapter II. Experiments | 4886 |
| Chapter III. Exchanging The Nests | 3647 |
| Chapter IV. More Enquiries Into Mason Bees | 6859 |
| Chapter V. The Story of My Cats | 5067 |
| Chapter X. The Tribulations of The Mason Bee | 6086 |
| Making a Bug Home | 12277 |
