144 YOUNG ANTS KECOGNISED 



were watched continuously until 4 p.m., but were not 

 attacked, nor even threatened. The following morning 

 one of them was quite well, the other one we could 

 not distinguish ; she had probably been cleaned. If 

 she had been killed, we must have found her dead 

 body. I then at 10 a.m. put in two more. At 

 10.30 one of them was attacked for a moment, but 

 only for a moment. With this exception neither of 

 them was attacked until 2 o'clock, when one of them 

 was again seized and dragged about for a minute or 

 two, but then released again. We continued watching 

 them till half-past 4, when they seemed quite at home 

 amongst the others. On the other hand a stranger, 

 put in as a test at 12, was at once' attacked. It was 

 curious, however, that although she was undoubtedly 

 attacked, yet at the very same time another ant began 

 to clean her. 



The next morning we found one ant, and only one, in 

 the box outside the nest ; and this turned out to be the 

 stranger of yesterday. She had been almost cleaned ; 

 but there were one or two small particles of paint still 

 remaining, so that there could be no doubt of her 

 identity. 



The next day, November 27, I put in three more 

 of the ants derived from these pupae at 10 a.m. At 

 10.30 they were all right, running about amongst the 

 others. At 1 1 o'clock the same was the case ; but 

 whilst I was looking again shortly afterwards, one of 

 them was seized by an antenna and dragged a littJe 



