SENSE OF TOUCH. 



13 



their never being seen on the heights which there 

 rise steeply from the shore *. 



a Clouded yellow butterfly (Colias Edusa), male. 

 6 Pale-clouded butterfly (Colias Hyale), female. 



It is, probably, in part through the information de- 

 rived from the varied impression of air on the wings 

 that bees can return so unerringly to their hives ; and 

 hence the reason of their flying in curves and circles 

 both when they depart and return, a circumstance 

 *J.R, 



c 



