EXPERIMENTS ON CO-OPERATION. 373 



At 11.37 — returned again and took another. 



11.40 

 11.52 

 At 12.2 another ant came to the larvae in the left- 

 hand cup. I imprisoned her. 



At 12. 3 — returned again and took another 

 12.15 



12.30 „ ,, 



12.37 — 



O. 6 ,, . 5, 



At 3.10 another ant came to the left-hand cup. I 

 imprisoned her. 



At 3.14 returned again and took another. 



O.J 5 „ )j 



