4 UNDESCRIBED INSECTS 
IN 
Oy ed 
THE COLLECTION 
OF 
WILLIAM WILSON SAUNDERS, ESQ., 
F.RS., F.LS.; &. 
Vou. I. 
DIPTERA—By FRANCIS WALKER, F.LS. 
q 
: 
aa 
LONDON : = 
JOHN VAN VOORST, PATERNOSTER ROW. ‘ 
M,DCCO.LYI. a 
es a e - 
/ * Aj wr 
+e se 
«* 2 
