| Chapter IV. The Mother Decides the sex of the egg | 5443 |
| Chapter V. Permutations of Sex | 5650 |
| Chapter I. The Terebinth Aphids. | 6278 |
| Chapter II. Experiments | 5958 |
| Chapter III. Exchanging The Nests | 4513 |
| Chapter IV. More Enquiries Into Mason Bees | 7834 |
| Chapter V. The Story of My Cats | 6011 |
| Chapter X. The Tribulations of The Mason Bee | 7197 |
| Making a Bug Home | 13550 |
