DIFFICULTY IN FINDING WAY. 



251 



4 inches from the base of the pencil. I then put an 

 ant to the larvae ; when she had become acquainted 

 with the road, she went very straight, as is shown in 

 the woodcut (Fig. 12). In one case, at the point E, she 

 dropped her larva and returned for another. When 



Fig. 12. 



Routes followed in experiment No. ) , as detailed above 



A, position of pencil. B, paper bridge. C and D, glass with lame. 

 E, point where larva dropped, the opposite arrow and loop marking 

 return route. 1, 2, 3, 4, comparatively straight paths to the glass. 

 5, 6, circuitous route on shifting of glass. . different access to nest. 



she returned on the next journey and was on the glass, 

 I moved it 3 inches, to D, so that the end of the glass 

 was 6 inches from the base of the pencil. If she were 

 much guided by sight, then she would have had little 



