INTELLIGENCE OF WASPS 159 



That wasps have a good memory was 

 shown by those that learned to go to their 

 nests through a paper opening of various 

 colours. They not only observed the 

 colours but remembered them. 



Once a wasp's nest was built in an attic, 

 and the wasps were in the habit of ap- 

 proaching it through an open window. 

 One day this window was closed, and 

 after bumping against the glass a few 

 times, the wasps found another entrance, 

 and did not again attempt to pass through 

 the window. 



Wasps show a good deal of ingenuity in 

 accomplishing their ends. A wasp, having 

 caught a large fly, whose wings, being 

 blown by the wind, impeded its progress, 

 was seen to stop and cut ofi^ the useless 

 and troublesome members. It is quite 

 common to see wasps cut an insect in two 

 when it is too large to be carried whole. 



More remarkable than this, however, is 

 the device sometimes used by hornets that 



