140 YOUNG ANTS RECOGNISED EVEN 



was being dragged about by an antenna. 2.30, both 

 were being attacked. At 2.45 one was dragged out of 

 the nest. 



I then put back one of the old ones ; as might have 

 been expected, she was received quite amicably. 



I then tried the same experiment with another 

 species, Lasius niger. I took some pupae from two of 

 my nests, which I knew not to be on friendly terms, 

 and which I will call 1 and 2, and confided each batch 

 to three or four ants taken from the other nest. When 

 they had come to maturity I introduced them into the 

 nests as before. 



They were taken from their nest on September 20; 

 and the results were as follows. 



Pupge from nest 1 confided to ants from nest 2. 



September 20. — Put one of the young ones into 

 nest 2 at 7.15 a.m. Several at once threatened her. 

 At 7.25 one of the ants seized her by an antenna, and 

 began dragging her about. 7.30, she was still being 

 dragged about. 8, ditto. 8.15, she was now being 

 dragged about by three ants. 8.30, she was still attacked. 

 9, ditto. At 9.15 she was dragged out of the nest. 



September 23. — Put two of the young ants into 

 nest 1 at 9.15 a.m. One was at once attacked, and 

 the other a few minutes afterwards. 9.45, both were 

 attacked. 10, ditto. One was now dead and hanging on 

 to a leg of assailant. 10.15 ditto. 10.45, both were still 

 being dragged about. 



At 11 A.M. I put into nest 2 three more very yovmg 



