| Chapter IV. The Mother Decides the sex of the egg | 6214 |
| Chapter V. Permutations of Sex | 6451 |
| Chapter I. The Terebinth Aphids. | 7007 |
| Chapter II. Experiments | 6932 |
| Chapter III. Exchanging The Nests | 5383 |
| Chapter IV. More Enquiries Into Mason Bees | 8818 |
| Chapter V. The Story of My Cats | 6738 |
| Chapter X. The Tribulations of The Mason Bee | 8049 |
| Making a Bug Home | 14542 |
