192 INSECT TRANSFORMATIONS. 



a, The spit frog-hopper (Tettigonia spumarin) flying, b, froth 

 covering the grub of the same. 



amounts almost to demonstration, from a circumstance 

 discovered respecting ants by the younger Huber. 

 ^ The larvae of some ants,' says he, ' pass the 

 winter heaped up in the lowermost floor of their 

 dwelling. 1 have found, at this period, very small 

 larvae in the nests inhabited by the yellow ant [For- 

 mica Jlava), the field ant {F. cxspihim?), and some 

 other species. Those that are to pass the winter in 

 this state are covered with hair, which is not the case 

 in summer; affording another proof of that Provi- 

 dence at which naturalists are struck at every step.'* 

 The same growth of a warmer clothing for the 

 winter is well known to occur among quadrupeds, 

 particularly those which inhabit the higher northern 

 latitudes. I 



Upon the same principle, a number of the cater- 

 pillars which are hatched late in autumn, and are 

 destined to live over winter, are provided with a 

 warm clothing of hair or down This is the case 

 even with most of those which construct for them- 



* M. P. lluber on Ants, p. S2. 

 t See Menageries, vol i, p. 50. 



