252 



DIFFICULTY IN 



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

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

 tliat 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 it-; position when shifted. 1, 2, 3, 4, thin 

 white lines indicating the comparatively straight routes. 5, thick 

 white line, and fi, dotted line showing tortuous paths when glass had 

 been altered in position. The arrows indicate directions travelled. 



