| Chapter IV. The Mother Decides the sex of the egg | 4301 |
| Chapter V. Permutations of Sex | 4523 |
| Chapter I. The Terebinth Aphids. | 5103 |
| Chapter II. Experiments | 4667 |
| Chapter III. Exchanging The Nests | 3484 |
| Chapter IV. More Enquiries Into Mason Bees | 6643 |
| Chapter V. The Story of My Cats | 4865 |
| Chapter X. The Tribulations of The Mason Bee | 5874 |
| Making a Bug Home | 11915 |
