CONTENTS. Xj 



PA OB 



Latreille, St. Fargeau, Forel — Difference of character among 

 ants — Experiments — Isolated combats — Neglect of com- 

 panions If in trouble — Experiments with insensible ants — 

 Drowned ants — Buried ants — Contrast of behaviour to 

 friends and strangers — Instances of kindness — A crippled 

 ant — A dead queen — Behaviour to chloroformed friends — 

 Behaviour to intoxicated friends . . . .93 



CHAPTER VI, 



RECOGNITION OF FRIENDS. 



Number of anta in a community — They all recognise one another 

 — All others are enemies — Recognition after separation — 

 Strange ants never tolerated in a nest — Experiments — Be- 

 haviour to one another after a separation of more than a 

 year — Recognition unmistakable — How are they recognised ? 

 — Some naturalists have suggested by scent, some by a 

 pass-word — Experiments with intoxicated ants — With pupaa 

 removed from the nest and subsequently returned — Separa- 

 tion of a nest into two halves, and recognition as friends by 

 the ants in each half of young bred in the other half — Pupae 

 tended by ants from a different nest treated as friends in 

 the nest from which they were taken, and as strangers if 

 put into the nest of their nurses — Recognition neither per- 

 sonal nor by means of a pass- word . 118 



CHAPTER VII. 



POWER OF COMMUNICATION. 



Statements of previous writers : Kirby and Spence, Huber 

 Franklin, Dugardin, Forel — Habit of bringing friends to 

 food — Exceptional cases — Experiments to determine whether 

 ants are brought or directed to stores of food — Scent— Sight 

 — Experiments with different quantities of food — Ants 

 which returned empty-handed and brought friends to 

 assist . . 15S 



