viii LIST OF ILLUSTRATIONS 



PAGE 



Grasshopper : Nymph and Adult , . 66 



Oblong Leaf-winged Grasshopper. From Harris . . . . -67 

 Common Cricket. Female. From Harris . . . . , . 68 



Tree Crickets : Male and Female. From Harris 68 



Mole Cricket. From Harris . . ... . . . .70 



Squash Bug . . . * , ' . -, ..',. ' ' > V . . 73 

 Chinch Bug. From Harris . . . . . . . 75 



Map showing Distribution of Chinch Bugs. After Webster ... 76 

 Periodical Cicada . . . ....'." '. . . 79 



Tree Hoppers. From Harris . . . . . . 80 



Scale Insects on Rose , . . . , . -.-.,. 83 

 San Jose Scale . ... . . . . . . .84 



Black Scale . . . . . . . . . . . 85 



Spring Grain Aphis. Redrawn from Webster . . ... 88 



Eggs of Apple Aphis . . .-,..,. . . . 91 



Ant attending Aphides . . i . ' . . . . . .92 



Elm Leaf affected by Aphides . .93 



Cicada emerging from Nymph Skin. Photograph by A. H. Verrill . 95 

 Promethea Moth Cocoon . . . . . . . . 96 



Orange-dog Caterpillars. Photograph by A. H. Verrill. . ' . . 98 

 Butterfly of Orange-dog Caterpillar. Photograph by A. H. Verrill . 99 



Luna Moth 102 



Tent Caterpillar . . . . . . . . ... 103 



Gypsy Moth .'.... . . . . . . .104 



Army Worm . . ; .**,., . . . . . 108 



Cutworm Larva. From Harris . . . . . . . .no 



Cotton Bollworm. Photograph by A. H. Verrill in 



Codling Moth . . , , ..... . . 113 



Apples showing Calyx Open and Calyx Closed . . ... 114 



Leaf Roller Moth. From Harris . ... . . .115 



Peach-twig Borer. After Clarke . . . . . . , v .117 



Tineid Moth . . . . . . . . . . . : ' . 118 



Winter Nest of Brown-tail Moth . 121 



Hessian Fly . .... .. . . . .. .122 



Hessian Fly Magnified 123 



Apple Maggot .- . . 125 



Channels of Apple Maggot . 126 



Cabbage Maggot. Adapted from Washburn 127 



White Grub or May Beetle 131 



Lamellicorn Beetle. From Harris 132 



Potato injured by White Grub 132 



