Stages and Work of Sprint. Canker-Worm {PaUacrita vemata). 1 



1 — Egg mass on bark scale. 2 — The larvae or canker-worms. 3 — Pupa?. 

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

 when small. 7 — Later work of the larva?, only the midribs of leaves being 

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



'Bur. Ent. Bull. 08 Pt 2. 



(992) 



