| Chapter IV. The Mother Decides the sex of the egg | 4317 |
| Chapter V. Permutations of Sex | 4510 |
| Chapter I. The Terebinth Aphids. | 5137 |
| Chapter II. Experiments | 4694 |
| Chapter III. Exchanging The Nests | 3494 |
| Chapter IV. More Enquiries Into Mason Bees | 6657 |
| Chapter V. The Story of My Cats | 4876 |
| Chapter X. The Tribulations of The Mason Bee | 5888 |
| Making a Bug Home | 12028 |
