xii TABLE OF CONTENTS. 



PAGE 



The testes, 34 



The egg 34 



Growth of the insect within the egg, 35 



The egg cutter, 38 



Metamorphosis of insects — the larva, 38 



Number of larval moults, 39 



The pupa, 40 



The imago, 41 



Parthenogenesis, 41 



Broods or generations of insects, 42 



Contagions dist as, s of insects due to a rdmal and vegetable germs, . 42 



The destruction of insect pests by means of insect fungi, .... 45 



Unusual increase in the number of insects, 48 



Influence of changes of temperature on insect-life, 49 



Period ici l// in insect-life, 52 



Number of species of insects 52 



CHAPTER III. 



CLASSIFICATION OF IXSECTS. 54-177 



Synopsis of the orders of insects, 54 



Tabular view of the orders of insects 56 



Order I. Thysanura, 56 



Order II. Derma p/era, 58 



Order III. Orthoptera, .' 59 



Order IV. Platyptera, 63 



Order V. Odonata, 68 



Order VI. Plectoptera, 71 



Order VII. Thysanopiera 73 



Order VIII. Uemiptera 74 



Order IX. Neuroptera, 84 



Order X. Mecaptera 88 



Order XI. Trichoptera, 90 



Order XII. Coleoptera, 91 



Order XIII. Stphonaptera, 115 



Order XIV. THptera 117 



Order XV. h/tidoplera 137 



Order XVI. Hymenoptera, 161 



