EECOGNITION OF FKIENDS. 333 



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 di'agged about by one of her antennae. 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 5. — Put in a 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 1 1 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 

 antennae ; the friend was not attacked. 1 2 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, 



