CONTENTS. xi 
PAGE 
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 : : ga 
CHAPTER VI. 
RECOGNITION OF FRIENDS. 
Number of ants 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 pup 
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—Pupz 
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 VIL. 
POWER OF COMMUNICATION. 
Statemen's 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—Ssight 
—HExperiments with different quantities of food—Ants 
which returned empty-handed and brought friends to 
assist. : ‘ . . : : + 163 
