364 POWER OF COMMUNICATION. 



I marked. These went on working quietly with the 

 first two till I left off observing at 7 p.m. ; and during 

 this latter time only three other ants found the larvae. 



On January 31 I watched another specimen. At 

 9.14 I put her into a small cup containiDga number of 

 larvae. She worked continuously till half-past seven in 

 the evening, when I left off watching. During that 

 time she had made more than ninety journeys, carrying 

 each time a larva to the nest. During the whole time 

 not a single other ant came to the larvae. 



Again, on February 7, I watched two ants in the 

 same manner. At 7 a.m. I put some larvae in the small 

 china cups. Up to 8 no ants had come to them. Soon 

 after 8 I put two marked ants, neither of them being 

 the same as those whose movements are above recorded. 

 They were then watched until 7.45 p.m., during which 

 time one of them had made twenty-six journeys, carry- 

 ing off 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. 

 I repeated this several times with similar results. 



The following case is particularly striking. On 

 July 11, 1875, at 11 a.m., I put a Lasius fiavus to some 

 pupae of the same species, but from a different nest. 

 She made eighty-six journeys, each time carrying off a 

 pupa, with the following intervals. Commencing — 



