| Chapter IV. The Mother Decides the sex of the egg | 6339 |
| Chapter V. Permutations of Sex | 6544 |
| Chapter I. The Terebinth Aphids. | 7138 |
| Chapter II. Experiments | 7098 |
| Chapter III. Exchanging The Nests | 5542 |
| Chapter IV. More Enquiries Into Mason Bees | 8996 |
| Chapter V. The Story of My Cats | 6844 |
| Chapter X. The Tribulations of The Mason Bee | 8179 |
| Making a Bug Home | 14666 |
