372 EXPERIMENTS ON CO-OrEEATION. 



They were then watched until a quarter to eight in the 

 evening, during which time one of them had made 

 twenty-six journeys, carrying ofif a larva each time ; the 

 other forty- two. During this period of about eleven 

 hours, two other ants had come to the cup at which 

 these were working, and the same number to one of the 

 other cups. 



None of these ants, therefore, though they had found 

 a large number of larvae, more than they could carry in a 

 whole day, summoned any other to their assistance. 



Again, February 7, 1875, I put some larvae in three 

 porcelain cup-s in the feeding-box of a frame containing 

 a nest of Lvsius fiavus, about six inches from the 

 entrance of the frame, and put, at 8 and 8.29 a.m. 

 respectively two ants to the larvae in the left-hand 

 cup. They each carried ofif a larva and returned as 

 follows : — 



No. ). No. 2. 

 At 8.35 — returned again and took another. 



9. 



9..S0 

 9.54 



9. 7 

 9.20 



9.43 



9.56 

 10.20 

 J 0.25 — 



At 10.43 another ant came to the larvae in the 

 riffht-hgnd cup. I imprisoned her. 



At 11. returned again and took another. 



11. 1 



11.15 



11- 9 



55 n 



11.20 

 11.29 



