CONTENTS 163 



14. The forest tent caterpillar 241 



15. The oak tussock caterpillar 244 



16. The pale tussock caterpillar 245 



17. The hickory tussock moth 246 



18. The variable oak leaf caterpillar 247 



19. The yellow-striped oak caterpillar 244 



20. The brown anisota 251 



21. The green-striped maple worm 252 



22. The Viceroy 253 



23. The red humped oak worm 253 



24. The red humped apple worm 254 



25. The poplar leaf tyer 256 



26. Abbott's pine sawfly 258 



27. The cottonwood leaf beetle 259 



28. The spotted willow leaf beetle 261 



29. The hickory horned devil or regal walnut caterpillar 263 



30. The imperial moth 265 



31. The cecropia moth 266 



32. The polyphemus moth 267 



33. The luna moth 268 



34. The promethia moth , . . 268 



35. The io moth 270 



36. The mourning cloak butterfly 271 



37. The gipsy moth 273 



38. The brown-tail moth 277 



XI. SCALE AND OTHER SUCKING INSECTS 280 



1. The San Jose scale 280 



2. The Putnam scale 283 



3. The English walnut scale 283 



4. The obscure scale * 284 



5. The oyster shell bark louse 285 



6. The scurfy bark louse 288 



7. The willow scurfy scale 289 



8. The dogwood scurfy scale 290 



9. The elm scurfy scale 290 



10. The pine leaf scale 291 



11. The honey locust scale 293 



12. The euonymus scale 293 



13. The rose scale 7. 295 



14. The cottony maple scale 295 



15. The cottony maple leaf scale 297 



16. The maple phenacoccus 298 



