| Chapter IV. The Mother Decides the sex of the egg | 5933 |
| Chapter V. Permutations of Sex | 6144 |
| Chapter I. The Terebinth Aphids. | 6729 |
| Chapter II. Experiments | 6550 |
| Chapter III. Exchanging The Nests | 4919 |
| Chapter IV. More Enquiries Into Mason Bees | 8340 |
| Chapter V. The Story of My Cats | 6459 |
| Chapter X. The Tribulations of The Mason Bee | 7736 |
| Making a Bug Home | 14214 |
