CONTENTS. Vll 



Page 



Methods of destroying, 



Wire worm the grub of Hemirhipus, 



Probable mistake respecting the destruction of wheat, 231 



Pea beetle of North America, 



Corn weevil, 234 



Meal worm, the grub of Tenebrio molitor, ib. 



Tabby moth caterpillar devours butter and fat, 236 



Intestinal worms, ib. 

 Mistakes of Linnaeus, Dr Barry, and Dr J. P. Frank, 237 

 Experiment of M. Deslonchamps, 



Extraordinary case of Mary Riordan, by Dr Pickells, 239 



Authenticity of this case proved, 241 



Fruit grubs, 242 



N ut weevil and its transformations, ib. 

 Apple-bud weevil, . 243 



Voracity of Calosoma, 244 



Rayed galleries of a bark-grub, 245 



Ravages of locusts, 246 



Their swarms in Southern Africa, 247 



The Italian locust, 249 



Migrations in Palestine and Europe, 250 



CHAPTER X. 



Voracity of maggots, 252 



Maggots of crane flies popularly called the grub, ib. 



Remarkable ovipositor, 253 



Destruction of herbage on Blackheath, 254 



Similar devastations in Poitou and Holderness, 255 



Wheat fly, described by Mr Shireff, 256 



Additional particulars by Mr Gorrie, 259 



Observations ofKirby, 260 



Mistake of Mr Markwick, 261 



Hessian fly, as described by Mr Say, 262 



Cheese-hopper the maggot of Piophila, 263 



Wonderful structure of this maggot, 264 



Its transformation into a fly, 265 



Origin of the house fly (Musca domestica), 266 



Mistakes of Ray and Reaumur, 267 



Voracity of the maggots of blow-flies, 268 



Instance of man devoured by them, \\ 3t 



Popular mistake respecting lady-birds, ggg 



Thair transformations traced to the egg, 270 

 Aphides checked by these and by Syrphidae, 



SECTION III. PUP^E. 



CHAPTER XI. 



Mechanism of suspending chrysalides, 272 

 Proceedings of larvae upon their approaching change, 273 

 In what manner some caterpillars suspend themselves, 274 



