CONTENTS. XV 



Page 



149 



2. Injuries to our living vegetable property — continued. 



Grapes - - - - 



Fruit trees generally . - - - 150 



To Plantations and Groves - - - - 151 



By Beetles - - - - - 151 



Caterpillars ----- 152 



Aphides (honey -dew) - - - - 153 



Insects attacking the interior of trees - - ' 154 



Insects attacking their bark and alburnum - - 156 



LETTER VII. 



Indirect Injuries — continued . . - - 160 166 



The ravages of Locusts ----- 160—166 



LETTER VIII. 



Indirect Injuries — concluded - - - - 167 — 178 



3. Injuries to our dead property , whether animal or vegetable - - 167 — 178 



To our Food ----- 167 



Drugs ----- 169 



Clothes ----- 170 



Houses and furniture ... - 171 



Timber " ' " ' ■ ^P 



Books, Pictures, &c. ... - 173 



Dead Stock generally - . - - 174 



LETTER IX. 



I 



Indirect Benefits derived from Insects - - - 179 — 205 



By maintaining a due balance between vegetable and animal productions 180 



removing nuisances and deformities - - - - 181 



destroying noxious Insects . - - - 185 



serving as food for other animals - - - - 195 



promoting the fertilization of plants - - - 203 



LETTER X. 



Direct Benefits derived from Insects - - - ~ 206 — 226 



As serving for the food of man - - - * 206 



As affording Medicines ... - - 213 



Dyes ----- 215 



Wax ----- 220 



Honey _ . - - - 221 



Silk - - - - - - 222 



LETTER XL 



Affection of Insects for their Young - - - 227 — 250 



1. Insects which perish before their young come into existence - - 227 — 237 



Butterflies ------ 227 



Ichneumons ----- 228 



Sand Wasps, &c. - - - - - 230 



Wild Bees ------ 232 



Beetles ------ 233 



