Vol. xxiv] 



ENTOMOLOGICAL NEWS 



309 



The insect, upon its next entrance required eight flights 

 around this obstruction before it could find the back wall of 

 the box, but after this was located, the nest was soon found. 



After the wasp left again, everything to confuse it was re- 

 moved and on its return it flew to the floor and walked to the 

 nest in the old way. 



Figure i shows the exact position of the nest in the box, just 

 three inches from the floor. The box offered a convenient 

 opportunity for attempting to confuse the builder by turning 



LEFT 



TOP 

 BA.CK. WALL 



BOTTOM 



RIGHT 



LEFT 



RIGHT 



BOTTOM 



LEFT 



TOP 



3. 



TOP 



the nest about. The box was therefore shifted about on the 

 original spot so as to bring the nest into several different posi- 

 tions. 



The box was first turned so that the right side became the 

 bottom ; this brought the nest into the position indicated in 

 Figure 2. Originally the openings of the cells had pointed 

 downward ; this change brought the openings to face upward, 

 and the nest which before had been on the right side of the 

 box was now on the left. 



Presently the wasp returned, walking up one side of the box 



