334 RECOGNITION OF FRIENDS 



the friend was being cleaned. 2.30 P.M. ditto, 3 ditto. 

 At 3.30 P.M. the friend was almost clean : the stranger 

 was being dragged about. 6 P.M. ditto. 



June 10. Eepeated the same observation at 10 A.M., 

 but transposed the colours by which they were distin- 

 guished, so that there might be no question whether 

 perhaps the difference of treatment was due to the 

 difference of colouring. At 11 A.M. the friend was un- 

 molested, the stranger was being dragged about by an 

 antenna. 1 1 .30 A.M. the friend unmolested, the stranger 

 being dragged about by one leg. 12 A.M. ditto. 

 12.30 P.M. the friend unmolested, the stranger being 

 dragged about by an antenna. 1 P.M. ditto, 2 P.M. 

 ditto, 3 P.M. ditto. 



July 3. Put in a friend and a stranger at 11 A.M. 

 At 11.30 A.M. the stranger was being dragged about, 

 the friend was being cleaned. 12 A.M. ditto. 12.30 A.M. 

 both were now being attacked. 1 P.M. ditto. 



This seems to show that some at least of the 

 ants have forgotten their old friends. Perhaps, however, 

 these were young ants. 



July 16. Put in two friends at 7.45 A.M. At 8 A.M. 

 each was being dragged about by an antenna. 8.30 A.M. 

 one was being dragged about by both antennae, the 

 other by both antennae and one leg. 10 A.M. both were 

 still attacked, but it is curious that at the same time 

 others were cleaning off the paint. 12.30 P.M. both 

 still attacked. 



July 17. Put in a friend at 8.15 A.M. At 8.30 A.M. 

 they were cleaning her. At 9 A.M. she was almost clean. 

 9.30 A.M. she seemed quite at home, and had only one 

 spot of paint on her. 10.20 A.M. ditto. 



July 20. Put in a friend and stranger at 9 A.M. 

 At 9.30 A.M. the friend seemed all right ; the stranger 

 was in a corner by herself. At 10 A.M. the friend was 

 being cleaned ; the stranger had come out of her corner 

 and was being fiercely attacked. At 11 A.M. the friend 



