List of illustrations. 



PAGE 



Figure 1. — The Arclireopteryx, 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 Larvje of Butterflies, 14 



Figure 8. — Pupa; or Chrysalids, 15 



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

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



Figure 11. — Hynienopterous 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 l(i. — 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 Tliree Weeks old, . . . 43 



Figure 20. — Young Grouse, 43 



Figure 21. — Young Woodcock, . . .44 



Figure 22. — Young Robins, ......... 44 



Figure 23. — Young Crows, .......... 49 



Figure 24. — Billing, or feeding by Regurgitation 52 



Figure 25. — Chipping Sparrow feeding Young, 55 



Figure 26. — Yellow-throat catching Birch Aphids, 63 



Figure 27. — Western Cricket, 05 



Figure 28. — Gulls saving Croi:)s 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. — Ruffed 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 



