| Chapter IV. The Mother Decides the sex of the egg | 6726 |
| Chapter V. Permutations of Sex | 6790 |
| Chapter I. The Terebinth Aphids. | 7430 |
| Chapter II. Experiments | 7526 |
| Chapter III. Exchanging The Nests | 5897 |
| Chapter IV. More Enquiries Into Mason Bees | 9358 |
| Chapter V. The Story of My Cats | 7103 |
| Chapter X. The Tribulations of The Mason Bee | 8482 |
| Making a Bug Home | 15133 |
