DANCE OF THE EPHEMERAE. 



327 



frequently they are to be found somewhere in the 

 neighbourhood of the stream, enjoying an aerial 



Dance of the Ephemei 



dance, The feet of the insect are armed with hooks 

 of great minuteness, and by their means the insect 

 attaches itself to a suitable object, sometimes to a 

 wall, sometimes to a twig, or to the trunk of a tree ; 



