BISTON SUPPRESSARIA. 453 

3. What becomes of the September moth? Does it lay 
eggs at once, and do these eggs remain unhatched 
throughout the winter, or do they hatch out at once? 
4. If the eggs laid by the September moth hatch out at 
once, is there an autumn (or third) generation ? 
5, Isthere a spring or first generation, the caterpillars of 
which would appear at the end of March or early 
in April, the pupz and moths in May-June? 
6. What predaceous and parasitic insects attack the grub 
and pupal stages of the pest? 
