DTTKHAM DIPTEEA. 3 



and index will, I hope, enable any one accurately to follow 

 the tables, without the almost endless mistakes which I had 

 to wade through at first, for want of some short but full 

 explanation of terms. 



This list is not meant for advanced Dipterists, whose 

 number is very few. But I hope that it may be the means of 

 enabling several in this and other counties to make a start with 

 these interesting insects. Having made a start, they will 

 probably want fuller details than can be given here. Books 

 on Flies in this district are not many, and those there are are 

 not very accessible. On the Syrphidae Mr. Verrall's book is 

 all that could be wished, but it is practically the only book in 

 English on Flies, and deals so far with but one large and two 

 small families. Walker's " Insecta Britannica," in English, is in 

 the Museum Library, the Newcastle Reference Library, and the 

 Dean and Chapter Library at Durham, but it is now quite 

 out of date. Macquart's book on French Diptera in French, 

 and Zetterstedt's great 12-volume work on the Scandinavian 

 Diptera in Latin, are in the Dean and Chapter Library. 

 There are also some short descriptive lists of certain families 

 in English, reprints from entomological magazines. Particulars 

 of these and a large number of Continental works on the 

 subject will be found in the catalogues of the scientific book- 

 sellers. 



