| Chapter IV. The Mother Decides the sex of the egg | 5255 |
| Chapter V. Permutations of Sex | 5476 |
| Chapter I. The Terebinth Aphids. | 6105 |
| Chapter II. Experiments | 5756 |
| Chapter III. Exchanging The Nests | 4334 |
| Chapter IV. More Enquiries Into Mason Bees | 7649 |
| Chapter V. The Story of My Cats | 5842 |
| Chapter X. The Tribulations of The Mason Bee | 6993 |
| Making a Bug Home | 13317 |
