CONTENTS. Vti 



Page 



Experiments of Reaumur ... 97 



Cry of the death's-head moth ...... 96 



Experiments of Passerini and Duponchel , ... 98 



The death-watch 98 



Ridiculed by Dean Swift 99 



Observations of Swammerdam and Derham . . . 100 



Opinions of Geoffrey, Ollivier, and Tigny .... ib. 



Several species of death-watch 101 



Imperceptible sounds . 102 



Range of human hearing 104 



Organ of hearing in insects ........ 105 



Position of the ears of Certain animals ib. 



Antennae of insects analogous to ears . . . . . 106 



Remarks of Kirby and Spend? . . ib. 



Illustrations from the hare and the rook .... 108 



Experiments by J. R 109 



Insects with very long antennae ib. 



Opinion of Huber respecting autennal language . . . 110 



Objections to this ........ 113 



Experiments and analogies disproving it . ... 114 



An tennal box of water-beetles ...... 115 



Opinion of Comparetti ...., . . 116 



Comparison with the stethoscope ...... 11? 



CHAPTER V. VISION OF INSECTS. 



Insects which are supposed to be blind . . . . 118 



Experiments by J. R. on Ponera contracta . * * . 119 



Spiders said to' be blind ....... ib. 



Vision of bees 121 



Seeing one object with multiplying eyes . . . 123 



Illustration, from birds 124 



Various positions of the eyes of spiders ..... 125 



The coronet eyes of bees ....... 127 



Experiments by Reaumur ib. 



Double eyes of the whirlwig ..*... 128 



Experiments of Leeuwenhoeck ...... 129 



Structure of the eyes of bees ...... 130 



Mr. HerschelPs opinions on vision 132 



Researches of Muller of Bonn ...... 133 



SECTION II. FOOD OF INSECTS. 



Division of insects according to their feeding organs ... 142 

 CHAPTER VI. EATING INSECTS. 



The jaws of insects . . . . 144 



Jaws of insects do not indicate their food .... 1 45 



Illustration from the stag-beetle and the earwig ... ib. 



Method of entrapping earwigs 147 



Cannibalism of earwigs ....... ib. 



Similar propensities of crickets 148 



Experiment relative, to this ...... 149 



Tree- hoppers (Cicada) do not live on dew . . .150 



Locusts do not chew the cud ... 151 



Voracity of the cockroach ..... 152 



Cannibalism of the mantis . 154 



