vi 



CONTENTS. 



2. Active — continued. 



explosive discharges - 200 



emission of repulsive fluids - - - 201 



their weapons of defence - 205 



concealing themselves - 209 



feeding only by night - - - 215 



especial modes of defence - - - 216 



LETTER XXII. 



Motions of Insects. 



Larva and Pupa - 219 — 243 



1. Of Larvce. 



Destitute of proper legs - - - 221 



Provided with proper legs - - - 231 



Resicpng in water - - - - 237 



2. Of Pupce - - - - - 239 



LETTER XXIII. 

 Motions of Insects — continued. 



Imago - 



244—300 



While in repose 



- 244 



While in action 



- 245 



Walking - — - 



- 246 



Running - 



- 248 



Jumping - 



- 251 



Climbing - 



-256 



Flying - 



- 269 



without wings (Spiders) 



- 269 



with wings 



- 278 



Beetles 



- 279 



Earwigs 



- 281 



Stylops, &c, - 



- 281 



Grasshoppers, &c. 



- 281 



Field Bugs, &c. 



- 282 



May-flies, &c. 



- 283 



Butterflies and Moths - 



- 283 



Bees, Wasps, &c. 



- 286 



Flies, &c. - 



- 287 



Swimming - 



- 291 



Walking in or on water 



- 292 



Burrowing - 



- 293 



Hovering - 



- 296 



Gyrations - 



- 296 



Dancing - 



- 298 



