| Chapter IV. The Mother Decides the sex of the egg | 6070 |
| Chapter V. Permutations of Sex | 6310 |
| Chapter I. The Terebinth Aphids. | 6865 |
| Chapter II. Experiments | 6737 |
| Chapter III. Exchanging The Nests | 5096 |
| Chapter IV. More Enquiries Into Mason Bees | 8532 |
| Chapter V. The Story of My Cats | 6589 |
| Chapter X. The Tribulations of The Mason Bee | 7891 |
| Making a Bug Home | 14380 |
