138 ANTS REMOVED AS PUP^E, AND EESTORED 



August 9. Put in another as before at 7 A.M. At 

 7.30 she is quite at home among the others, and already 

 nearly cleaned. At 8 1 could no longer distinguish her ; 

 but certainly no ant was being attacked. 9 ditto. 



August 11. Put in another as before at 8 A.M. 

 At 8.15 she was quite at home. 8.30 ditto^ 9 ditto, 

 9.30 ditto, 10 ditto, 12.30 ditto. 



August 13. Lastly, I put in the remaining young 

 ant as before at 7 A.M. At 7.15 she was unmolested. 

 At 7.30 ditto and nearly cleaned. At 8 I could no 

 longer distinguish her ; but no ant was being attacked. 



Thus, then, as in the preceding experiment, these 

 six ants when reintroduced into the nest from which 

 they had been taken as pupae, were received as friends. 

 On the other hand, on August 5 I put a young ant of 

 the same batch into nest No. 36, from which the three 

 nurses had been taken. She was introduced at 11 and 

 was at once attacked. At 11.30 she was being dragged 

 about, and shortly after was dragged out of the nest. 

 I then introduced a second ; but she was at once 

 attacked like the first. 



August 22. I put some pupae of Formica fusca 

 from nest No. 64 under the charge of three ants from 

 nest No. 60. By September 7 several young ones had 

 emerged. I put two of them into nest No. 64 at 

 8.15 A.M. They were amicably received^ as in the pre- 

 ceding experiments, and the ants began to clean them. 

 At 8.30 they were all right. 8.45 ditto. At 9 they had 

 been completely cleaned, so that I could not distinguish 



