Excerpt from The Humble-Bee: Its Life-History and How to Domesticate It, With Descriptions of All the British Species of Bombus and Psithyrus
An article entitled "Bombi in Captivity and Habits of Psithyrus" that appeared in the Entomologist"s Это и многое другое вы найдете в книге The Humble-Bee (F. W. L. Sladen)