210 



SIR JOHN LUBBOCK ON THE H^VBLTS OF ANTS. 



Fig. 2. 



Routes followed in experiment No. 2, as detailed above. 



A, position of pencil. B, paper bridge. C and D, glass with larvse. E, point 

 where larva dropped, the opposite arrow and loop marking return route. 

 1, 2, 3, 4, comparatively straight paths to the glass. 5, 5, circuitous route on 

 shifting of glass. * different access to nest. 



back. Her pathway, howerer, 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 (5). 



I then varied the experiment as subjoined, and as shoM'n in the 

 woodcut (fig. 3). 



Exp.^. — I connected the parade-ground with the nest by a paper 

 bridge, the end of which is shown at B (fig. 3), and which came 

 down about an inch from the pole supporting the nest. This pole 

 rises 18 inches above the parade-ground. I then put the glass 

 tray (C) with larvse as before, 12 inches from the base of the pole, 

 and put an ant to the larvae. When she had learnt her way I 

 traced four of her routes, as shown in the thin lines 1, 2, 3, 4. I 

 then on her nest journey (5, thick white line), when she was on the 

 tray (C), moved it three inches to T), as shown in the figure, and 

 again traced her routes. The contrast is very striking between 

 the relatively straight thin white lines 1, 2, 8, 4 of the four 

 journeys when familiar with the road ; whereas in the broad white 

 line No. 5 the zigzag twistings show how much difficulty the ant 



