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 larva, 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 paths when glass had 
been altered in position. The arrows indicate directions travelled. 
