APPENDIX B.

THE following are the details referred to on p. 122:-On August 4, 1875, I separated one of my colonies of Formica fusca into two halves, and kept them entirely apart.

On March 15 following I put in a stranger and one of the old companions from the other half of the nest at 7 A.M., and watched them longer than those previously experimented on. The stranger was very soon attacked; the friend seemed quite at home.

June 4, 1876.-8 A.M. Put into the nest a stranger and an old friend. The stranger was at once attacked, and dragged about by one of her antennæ. 9 A.M. The stranger was being attacked; the friend, though not attacked, kept rather away from the other ants. 10.30 A.M. The stranger was attacked, not the friend. 12.30 P.M. ditto, 1 P.M. ditto, 1.30 P.M. ditto, 2 P.M ditto, 2.30 P.M. ditto, 4 P.M. ditto, 4.30 P.M. ditto. 5 P.M The stranger was dragged out of the nest.

At

June 5.-Put in a stranger and a friend at 9.30. 10 the stranger was being attacked, not the friend. 10 A.M. ditto, 10.30 A.M. ditto.

At 11 A.M. I put in another stranger and another old friend, when nearly the same thing was repeated. At 11.30 A.M. the stranger was being dragged about by her antennæ; the friend was not attacked. 12 A.M. The stranger was by herself in a corner of the nest. The friend was almost cleaned from the paint by which she was marked. I then put in another friend. At 2 P.M. the stranger was being dragged about by an antenna,

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.-Repeated the same observation at 10 A.M., but transposed the colours by which they were distinguished, 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 all right, the stranger was being dragged about by an antenna. 11.30 A.M. the friend all right, the stranger being dragged about by one leg. 12 A.M. ditto. 12.30 P.M. the friend all right, 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. some at least of the Perhaps, however,

This seems to show that ants have forgotten their old friends. these were young ants.

At 8 A.M.

8.30 A.M.

July 16.-Put in two friends at 7.45 A.M. each was being dragged about by an antenna. one was being dragged about by both antennæ, the other by both antennæ 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.

At 8.30 A.M.

July 17.-Put in a friend at 8.15 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