192 IiVSECT TKAXSFORMATIOXS. 



a, The spit frog-hopper (Tctti'^onia spumarin) flying, i, Iroth 

 • 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. I have found, at this period, very small 

 larvae in the nests inhabited by the yellow ant {^For- 

 mica Jlava), the field ant {F. ccespitum'?), 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.! 



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 thcm- 



* M. P. Huber on Ants, p. 82. 

 t See Menageries, vol. i, ji. 50. 



