FORMATION OF ASSOCIATIONS IN THE MAY-FLY 



15 



of my presence, the ends of the dish would be reversed, causing 



the specimen to be at the end farther away from me. This 



action was scarcely complete when the watchful nymphs would 



again be facing me and immediately proceeding on a rush to 



regain their former relative position. Such cases, however, are 



not recorded in the table. 



TABLE VIII 



Showing Gradual Formation of Associations in Three Specimens of H. 

 Interpunctata in Their Feeding Reactions 



