a i 
phi” , , *% . 
7 _ 
PREFACE. 
Ix the present yolume will be found characters of nearly 
all the undescribed species of Dipterous Insects in my 
collection which had been received to the end of the 
year 1854. Mr. F. Wauxpr, a gentleman well known 
for his intimate acquaintance with this Order of Insects, 
has supplied the whole of the Manuscript. The Plates 
have been furnished by Mr. Wrstwoop, whose entomo- 
logical knowledge and skill in the delineation of Insects 
are universally admitted. To both I tender my best 
thanks. 
W. WILSON SAUNDERS. 
East Hill, Wandsworth, 
Jan. 18th, 1856, 
