x1] 
Flies 131 
ss 
iffy, 
sf ft 
iy eh 
aa 
ptf 
Hy ore 
aa | 
Me y foe 
t ce ij 
waa | 
cA en i! 
Py vd I 
ps 
rid es 
4 yet it 
byor Te 
phy ji 
Ce i te 
Dn aN (ie 
Fa eae q 
Bhs 
re af 
Fig. 39. The frit fly (Oscinus frit). A, the larva; B, the pupa; 
C, the fly. (Magnified.) 
9—2 
