SENSE OP TOUCH. 



13 



their never bein^ seen on the heights which there 

 rise steeply from the shore *. 



a Clouded yellow butterfly (^Colias Edusa), male. 

 b 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. 



