| Chapter IV. The Mother Decides the sex of the egg | 5347 |
| Chapter V. Permutations of Sex | 5565 |
| Chapter I. The Terebinth Aphids. | 6182 |
| Chapter II. Experiments | 5850 |
| Chapter III. Exchanging The Nests | 4424 |
| Chapter IV. More Enquiries Into Mason Bees | 7740 |
| Chapter V. The Story of My Cats | 5932 |
| Chapter X. The Tribulations of The Mason Bee | 7098 |
| Making a Bug Home | 13433 |
