| Chapter IV. The Mother Decides the sex of the egg | 6231 |
| Chapter V. Permutations of Sex | 6465 |
| Chapter I. The Terebinth Aphids. | 7019 |
| Chapter II. Experiments | 6948 |
| Chapter III. Exchanging The Nests | 5399 |
| Chapter IV. More Enquiries Into Mason Bees | 8834 |
| Chapter V. The Story of My Cats | 6752 |
| Chapter X. The Tribulations of The Mason Bee | 8062 |
| Making a Bug Home | 14560 |
