List of illustrations. 



PAGE 



Figure 1. — The Arohseopteryx, . . 5 



Figure 2. — Ground Beetle, . 9 



Figure 3. — Cutworm, 11 



Figure 4. — Noctuid Moth, . . . 11 



Figure 5. — Fly and its Larva, . 14 



Figure 6. — Chestnut Beetle or Weevil, 14 



Figure 7. — Caterpillars, the Larvse of Butterflies, . , . . . 14 



Figure 8. — Pupfe or Chrysalids 15 



Figure 9. — Predaceous Beetle, the Lion Beetle or Caterpillar Hunter, . 18 



Figure 10. — Predaceous Beetle, a Tiger among Insects 18 



Figure 11. — Hymenopterous Parasite, 18 



Figure 12. — Host Caterpillar with Cocoons of a Parasite upon its Back, . 19 



Figure 13. — Tiger Beetle, 19 



Figure 14. — Chinch Bug 27 



Figure 15. — Colorado Potato Beetle, 29 



Figure 16. — Hessian Fly . . . . 33 



Figure 17. — Alimentary Canal of Bluebird 41 



Figure 18. — Young Cedar Bird on its First Day, 42 



Figure 19. — Young Cedar Birds less than Three Weeks old, . . . 43 



Figure 20. — Young Grouse, 43 



Figure 21. — Young Woodcock, ... 44 



Figure 22. — Young Eobins, . 44 



Figure 23. — Young Crows 49 



Figure 24. ^Billing, or feeding by Regurgitation, 52 



Figure 25. — Chipping Sparrow feeding Young 55 



Figure 26. — 5fellow-throat catching Birch Aphids 63 



Figure 27.— Western Cricket 65 



Figure 28. — Gulls saving Crops by killing Crickets 66 



Figure 29. — Warblers destroying Plant Lice 71 



Figure 30. —The Winged Seed of White Pine, 92 



Figure 31. — A Forest Planter, 94 



Figure 32. —Buffed Grouse, "budding," 99 



Figure 33. — The Diligent Titmouse, 101 



Figure 34. — Winter Tree Guards, 104 



Figure 35. — Destructive Bark Beetle 107 



Figure 36. — Woodpecker hunting Borers 107 



Figure 37. — Larva of the Cecropia Moth, 110 



