252 



DIFFICULTY IN 



or no difficulty in finding her way back. Her pathway, 

 however (No. 5), which is traced on the paper, shows 

 that she was completely abroad ; and, after all, she got 

 back to the nest by a different route. 



Fig. 13. 



Routes followed in experiment No. 2, as mentioned in text. 



B, paper bridge leading to nest, c, glass tray with larvae, in its 

 first position ; and D in its position when shifted. 1, 2, 3, 4, thin 

 white lines indicating the comparatively straight routes. 5, thick 

 white line, and 6, dotted line showing tortuous path-; when glass bad 

 been altered in position. The arrows indicate direo.tions travelled. 



