LIST OF ILLUSTRATIONS ix 



PAGE 



Rose Chafer. From Harris. 133 



Eyed Elater. From Harris - 134 



Leaf Beetle. From Harris 135 



Colorado Potato Beetle 135 



Flea Beetle 139 



Round-headed Apple-tree Borer. From Harris 140 



Flum Curculio 142 



Strawberry Weevil. Redrawn from RUey 142 



Peach injured by Curculio 143 



Mexican Cotton Boll Weevil 144 



Infested Cotton Square , . . 145 



Cherry Sawfly ........... 149 



Willow Sawfly Larva 150 



Head of Aphis. Redrawn from Slingerland . . . '. . '55 



Bucket Pump 156 



A Simple Spraying Outfit Redrawn from Marlatt .... 158 



Powder Gun 161 



Tiger Beetles. From Harris 163 



Ground Beetles. From Harris 1 64 



Tiger Beetle Larva. From Harris 165 



Ladybird Beetle and Pupa. From Harris 165 



Blister Beetle. From Harris 166 



Soldier-bug 166 



Robber Fly. From Harris 168 



Syrphiis Fly 169 



White-faced Hornet. From Packard 1 70 



Dragon-fly Ijri 



Egg Mass of Mantis 171 



Dragon-fly. From Harris 173 



Ichneumon Fly ovipositing in Cocoon 174 



Long-tailed Ichneumon Fly. From Harris 175 



Ichneumon Fly and Chrysalis. Photography by A. H. Verrill . .176 



Ichneumon Flies. From Harris . . 1 77 



Cocoons of Microgaster Flies. From Harris 177 



Caterpillar with Cocoons of Parasites 1 78 



Parasite of Grain Aphis. Redrawn from Washburn . . , .179 



Chalcid Parasite of Gypsy Moth's Eggs. After Howard . . , 184 



Pelecinus Fly .... 185 



Tachinid of Army Worm. Dra7vnfrom Photograph by Slingerland . 188 



Tachinid Parasite of Gypsy Moth. After Fisie 190 



Cherry Blossoms . . 194 



