LIST OF ILLUSTRATIONS 15 



FACING PAGE 



A snowy tree cricket singing 118 



The typical dragon-fly face 120 



A robber-fly with its prey 120, 



Photomicrograph through the eye windows of a fly 122 



A harvestman following 124 



Egg mass of the greenbottle fly following 124 



A greenbottle laying eggs upon the head of a dead bird 127 



Greenbottle laying eggs in the bill of a starling 127 



Young greenbottle flies at work 129 



Skeleton of a muskrat cleaned by young greenbottle flies 131 



Test tubes containing foods liquefied by young flies 131 



Nest of the mound-building ants 134 



Cecropia caterpillars twenty-five days old 138 



Cecropia caterpillar casting its skin 138 



Caterpillars of the cecropia just after the second cast 138 



Eggs of the cecropia on an apple leaf 138 



Female cecropia moth 143 



The full grown cecropia caterpillar 143 



Newly completed cocoon of the cecropia caterpillar 143 



Squash flower opened to show nectar cup 147 



How the honey bee reaches the nectar in a squash flower 147 



A beetle at the entrance of the nectar cup 147 



Fertilized blossoms of the squash plant 148 



The yellow gaping throat of a squash flower 148 



Foamy dwellings of immature spittle bugs 150 



Growth of the spittle mass 150 



A dried spittle mass and the mature insect 152 



Huge spittle mass found in the jungle of British Guiana 152 



A thread-legged bug laying eggs 154 



A stampede of thread-legged bugs 156 



Greatly enlarged head of the thread-legged bug following 156 



A characteristic attitude of the thread-legged bug following 156 



A thread-legged bug casting its skin 157 



Spring-tails in their tiny world 159 



Spring-tails showing spines upon their bodies 159 



