| Chapter IV. The Mother Decides the sex of the egg | 6240 |
| Chapter V. Permutations of Sex | 6468 |
| Chapter I. The Terebinth Aphids. | 7028 |
| Chapter II. Experiments | 6957 |
| Chapter III. Exchanging The Nests | 5405 |
| Chapter IV. More Enquiries Into Mason Bees | 8841 |
| Chapter V. The Story of My Cats | 6759 |
| Chapter X. The Tribulations of The Mason Bee | 8071 |
| Making a Bug Home | 14572 |
