| Chapter IV. The Mother Decides the sex of the egg | 6340 |
| Chapter V. Permutations of Sex | 6545 |
| Chapter I. The Terebinth Aphids. | 7140 |
| Chapter II. Experiments | 7099 |
| Chapter III. Exchanging The Nests | 5544 |
| Chapter IV. More Enquiries Into Mason Bees | 8996 |
| Chapter V. The Story of My Cats | 6845 |
| Chapter X. The Tribulations of The Mason Bee | 8179 |
| Making a Bug Home | 14669 |
