CONTENTS. X] 



PA SB 



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

 anis — 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 ants in a community ^They all recognise one another 

 ^AU 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 pupaj 

 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 — Pupaj 

 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 . . . .119 



CHAPTER Vn. 



POWF,R OF COMMUNICATION. 



Statemeii+s of previous writers : Kirby and Spence, Huber, 

 Franklin, Dugardin, Forel — Habit of bringing friends to 

 food^ Exceptional cases — Experiments to determine whethe; 

 ants are brought or du-ected to stores of food — Scent — Sight 

 — Experiments with different quantities of food — Ants 

 which returned empty-handed and brought friends to 

 assist . . . . . '53 



