| Chapter IV. The Mother Decides the sex of the egg | 6059 |
| Chapter V. Permutations of Sex | 6306 |
| Chapter I. The Terebinth Aphids. | 6855 |
| Chapter II. Experiments | 6727 |
| Chapter III. Exchanging The Nests | 5052 |
| Chapter IV. More Enquiries Into Mason Bees | 8479 |
| Chapter V. The Story of My Cats | 6578 |
| Chapter X. The Tribulations of The Mason Bee | 7881 |
| Making a Bug Home | 14370 |
