236 A YEAR WITH NATURE. 



season. They are far too delicate and beautiful to escape our 

 attention. 



The flocks do not remain in the fields now as the nights are 

 too cold, and they are driven to the folds. We close our 

 essay for October by a reference to Oak-Galls or Oak-Balls. 

 These are caused by the Gall Fly. Shortly stated, the insect 

 deposits its eggs in the young twigs, the sap soon commences 

 to gather, the balls gradually form and harden. The grub 

 within feeds for a time upon the soft spongy interior, and 

 when ready to quit drills a small hole and casts itself upon 

 the wide unthinking world. 



. 





