46 STORRS AGRICULTURAL EXPERIMENT STATION 

Fic. 10—Apple leaf with eight mines. The lighter-colored one on 
the left is of the first brood. The pupal skin may be seen project- 
ing through a slit in the upper surface of the mine, where it was left 
when the adult moth emerged. The other, or darker colored mines 
are of the second brood and contain the caterpillars (reduced). 
time the pupae push themselves partly through the upper sur- 
face of the mine, break through their pupal skins and appear 
as fully developed moths, leaving the pupal skins partly pro- 
jecting through the slit in the leaf (Fig. 10). These tiny 
moths are very inconspicuous, but on close observation may 
be seen resting on the apple leaves. Like some other members 
of this family of insects, the moths assume a peculiar attitude 
while at rest. The fore legs are extended, while the others 
