Xll CONTENTS 



PAGE. 



3. Eggs of the Yellow Grasshopper (Melanoplus differ- 



entialis) 4 



4. Stages of last molt of the Yellow Grasshopper 5 



5. Nymph of Melanoplus, first stage 7 



G. Nymph of Melanoplus, second stage 7 



7. Nymph of Melanoplus, third stage 7 



8. Nymph of Melanoplus, fourth stage 7 



9. Nymph of Melanoplus, fifth stage 7 



10. Melanoplus adult 7 



11. Vertical section of ground, showing egg-pods 9 



12. Egg-pods of Melanoplus differentialis 10 



13. Egg of Black Swallowtail on flower-stem of parsnip. . . 13 



14. Newly hatched caterpillar 14 



15. Diagram of segments of caterpillar 14 



16. Caterpillars of Black Swallowtail feeding on wild celery, 15 



17. Caterpillars of Black Swallowtail about to molt 10 



18. Caterpillar of Black Swallowtail protruding horns 



( osmatcria ) 17 



19. Position of Caterpillar of Black Swallowtail before pu- 



pation 18 



20. Caterpillar of Black Swallowtail about to shed last 



larval skin 20 



21. The developing chrysalis of the Black Swallowtail 20 



22. Brown pupa-case of chrysalis of Black Swallowtail 21 



23. Empty pupa-case of Black Swallowtail 22 



23a-23w. Twenty-one figures illustrating life of a Moth.. 24-33 



24. Heads of male and female Cecropia Moths 39 



25. Fragment of outer surface (cornea) of eye of Dragon- 



fly 41 



26. Head of Dragon-fly 41 



27. Section through eye of fly (Musca vomitoria) 42 



28. One of the simple eyes of the fly (Musca vomitoria) .... 42 



29. Illustrating mode of vision in the many-faceted eye 43 



30. Front leg of cricket 44 



31. Wing-covers of male Katydid 44 



32. Wing-cover of male Cricket 45 



33. Lace-winged Fly and eggs 48 



34. Insect (Ortliezia graminis) 48 



35. Same insect with egg-mass 48 



36. Elder cane showing eggs of Tree Cricket 49 



