STAGES AND WORK OF SPRING CANKER-WORM (Paleacrita vernata). 1 



1 Egg mass on bark scale. 2 The larvae or canker-worms. 3 Pupse. 

 4 Female moths. 5 Male moth. 6 Work of canker-worms on apple leaves 

 when small. 7 Later work of the larvae, only the midribs of leaves being 

 left. 1-5 Considerably enlarged. 6, 7 Reduced. 



. Ent. Bull. 68 Pt 2. 



239 



