| Chapter IV. The Mother Decides the sex of the egg | 6316 |
| Chapter V. Permutations of Sex | 6521 |
| Chapter I. The Terebinth Aphids. | 7113 |
| Chapter II. Experiments | 7065 |
| Chapter III. Exchanging The Nests | 5473 |
| Chapter IV. More Enquiries Into Mason Bees | 8974 |
| Chapter V. The Story of My Cats | 6826 |
| Chapter X. The Tribulations of The Mason Bee | 8153 |
| Making a Bug Home | 14641 |
