RECOGNITION OF FRIENDS. 333 
APPENDIX B. 
Tue 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 antenne. 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. 
June 6.—Put ina stranger and a friend at 9.30. At. 
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 
antennz ; 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. J then put in another friend. At2 P.M 
the stranger was being dragged about by an antenna, 
