EXPEEIMENTS ON CO-OPERATION. 373 



At 11.37 — returned again and took another. 



11.40 

 11.52 



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

 hand cup. I imprisoned her. 



At 12. 3 — returned again and took another. 

 12.15 

 12.30 

 12.37 — 



3. o „ „ 



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

 imprisoned her. 



At 3.14 returned again and took another. 



3.15 „ „ 



3.24 



