IN FINDING THEIR WAY. 255 
sarva at E, with which she returned to the nest, without 
finding the pencil at all. On the following journey, 
shown in the fine white zigzag line (6), she found the 
pencil at last, but, as will be seen, only after many 
meanderings. 
Diagram of complex path traversed in experiment 4. 
A, first position of pencil. B, second position of pencil. 1, 2, 
straight lines of two tracks of the observed ants. 3, winding narrow 
white line, showing course pursued by the same ant before arriving 
at B, when the position of the pencil was unchanged. 
Experiment 4.—I then repeated the observation 
