ILLUSTRATIONS. 



Page. 



1. Egg mass of the gipsy moth (Porthetria dispar L. ) 16 



2. Full-grown caterpillar of the gipsy moth 17 



3. Pupa of the gipsy moth 18 



4. -Male gipsy moth 19 



5. Female gipsy moth 19 



6. The brown-tail moth (Euproctis chrysorrhcea): Male, female, and caterpillar.. 20 



7. Winter nest of the brown-tail moth 21 



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