SIK JOHN LUliUOCK ON THE HABITS OF ANTS. 241 



Fig. 3. 



Koutes followed in experiment No. 3, as mentioned in text. 

 B, paper bi-idge. C, glaes tray with larvje, its first position ; and D its posi- 

 tion 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. 



experienced in finding her way. Again the dotted sinuous white 

 line (6) shows the course adopted on a subsequent journey. 



Exp.4<.- — I then again varied the experiment as follows : — I 

 placed the larvae iu a small china cup on the top of the pencil, 

 which thus formed a column 7y inches high. The cross line close 

 to the arrows (fig. 4) is as before, the base of the paper bridge 

 going to the nest. C shows the position of the penny on which 

 the pencil is supported. The dotted white lines 1, 2, 3, 4 show 

 the routes- of a marked ant on four successive journeys from 

 the nest to the base of the pencil. I then moved the pencil 

 6 inches to D, and the two following routes are marked 5 and 

 6. In one of them, 5 (thick white line), the ant found a stray 



