EVIDENCE OF COMMUNICATION. 175 
is calculated to increase the number of friends brought 
by the ants to the glass with only 2 or 3 larvae, for 
several reasons, but especially because in many cases 
an ant which had for some time had access to a glass 
with many larve was suddenly deprived of it, and it 
might well be that some time elapsed before the 
change was discovered. Some stray ants would, no 
doubt, in any case have found the larve; and we 
may probably allow for about 25 under this head. 
Again, some would, no doubt, casually accompany their 
friends ; if we allow 25 also in this respect, we must 
deduct 50 from each side, and we shail have 254 
against 54. Nevertheless, even without any allowances, 
the results seem to me very definite. Some of the 
individual cases, especially perhaps experiments 9, 10, 
20, 21, and 22 (see Appendix), are very striking; and, 
taken as a whole, during 52 hours, the ants which had 
access to a glass containing numerous larve brought 304 
friends ; while during 59 hours those which were visiting 
a glass with only 2 or 3 larve brought only 104 to 
their assistance. 
One case of apparent communication struck me 
very much. I had had an ant (L. niger) under obser- 
vation one day, during which she was occupied in 
carrying off larve to her nest. At night I imprisoned 
her in a small bottle ; in the morning I let her out at 
6.15, when she immediately resumed her occupation. 
Having to go to London, I imprisoned her again at 
9 o'clock. When I returned at 4.40, I put her again 
