CONTENTS. IX 



Page 



Mistake of Bonnet with respect to the teazle-moth, 325 



Pupa cases opened by extraneous assistance, 328 



Observations on this by the younger Huber, 327 



Experiment by Dr J. R. Johnson, 329 

 De Geer's observations contrary to those of Svvara- 



merdam, 330 



Remarkable circumstance in the hive bee, 331 

 SECTION IV. PERFECT INSECTS. 



CHAPTER XIV. 



Expansion of the body and wings in insects newly trans- 

 formed, 333 

 Structure of birds to contain air, ib. 

 Expansion in the fly of the ant-lion, 334 

 The mandibles prove it carnivorous, 335 

 Transformations of dragon-flies, 336 

 Folded wings of some two winged flies, 338 

 Malpighrs account of the transformations of the silk- 

 worm, 339 

 Impulsion of fluids into the wings, 341 

 Kirby's account of the expansion of the swallow-tailed 



butterfly, 342 



Swammerdam's account of the wings of the bee, 343 



Air-tubes in insects' wings, 344 



Nervures in the wings of plumed moths, 345 



Perfect insects do not increase in size, 347 



Imperfect insects from fallen chrysalides, 349 



Discharges from newly-evolved insects, 350 



Supposed showers of blood accounted for, 351 



Theories devised to account for crimson-snow, 352 



Curious fact explaining this, by Mr T. Nicholson, 354 



Does not explain the red snow of the Alps, 355 



CHAPTER XV. 



Peculiar motions of insects, 356 



Motion indispensable to life, ib. 



Anecdote of a water-measurer, 357 



Mode of combing themselves used by spiders, 358 



Oscillatory motions of some tipulidae, 359 



Vibratory motions of syrphi on the wing, 360 



Similar motions of hawks, red-breast, &c, 361 



Experiment on Scioptera vibrans^ 362 



Illustrated by the wag-tail, &c, 363 



Gnat dances in winter, ib. 



Opinion of Wordsworth and others, 364 



Similar aerial dances of rooks, ib. 



Night-gambols of Corethrce ? on a book, 365 



Circular movements of a summer fly, 366 



Sportive movements not necessarily social, 367 

 Account of the whirlwig, by Kirby and by Knapp, ^ 36& 

 VOL. VI. B* 



