| Chapter IV. The Mother Decides the sex of the egg | 5421 |
| Chapter V. Permutations of Sex | 5636 |
| Chapter I. The Terebinth Aphids. | 6244 |
| Chapter II. Experiments | 5915 |
| Chapter III. Exchanging The Nests | 4477 |
| Chapter IV. More Enquiries Into Mason Bees | 7813 |
| Chapter V. The Story of My Cats | 6000 |
| Chapter X. The Tribulations of The Mason Bee | 7183 |
| Making a Bug Home | 13510 |
