| Chapter IV. The Mother Decides the sex of the egg | 3489 |
| Chapter V. Permutations of Sex | 3613 |
| Chapter I. The Terebinth Aphids. | 4274 |
| Chapter II. Experiments | 3821 |
| Chapter III. Exchanging The Nests | 2767 |
| Chapter IV. More Enquiries Into Mason Bees | 4917 |
| Chapter V. The Story of My Cats | 4082 |
| Chapter X. The Tribulations of The Mason Bee | 4987 |
| Making a Bug Home | 9804 |
