376 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE XXIII 



THE BAG OR BASKET WORM 

 ( Thyridopteryx ephemeraeformis ) 



rig. 1. — Branch of hard maple badly mutilated by the feeding caterpillars. 



Fig, 2. — A small hard maple tree, Cincinnati, Ohio, almost defoliated by 

 the bag worm. 



