| Chapter IV. The Mother Decides the sex of the egg | 4634 |
| Chapter V. Permutations of Sex | 4866 |
| Chapter I. The Terebinth Aphids. | 5458 |
| Chapter II. Experiments | 5057 |
| Chapter III. Exchanging The Nests | 3771 |
| Chapter IV. More Enquiries Into Mason Bees | 7004 |
| Chapter V. The Story of My Cats | 5208 |
| Chapter X. The Tribulations of The Mason Bee | 6238 |
| Making a Bug Home | 12482 |
