""Characters Of Undescribed Diptera In The Collection Of W. W. Saunders"" is a book written by Francis Walker and published in 1857. The book is a collection of descriptions of various species of Diptera (two-winged flies) that were previously unknown to science and were found in the collection of W. W. Saunders. The book contains detailed descriptions of the physical characteristics, habits, and habitats of each species, as well as illustrations...