iv.] CO-OPERATION AMONGST ANTS. 113 



At 11.48 N 1 came. At 11.49 went. 



11.49 N 4 11.50 



11.51 N 1 11.53 



11.53 N 3 11.56 



11.54 N 4 11.56 

 12.0 N3 12.2 

 12.0 N4 12.2 

 12.0 N 1 12.2 



12.5 N4 12.7 



12.6 N3 12.8 



12.13 N 3 12.15 



12.14 N 4 12.15 

 12.17 stranger came. 



12.19 N 4 came. 12.20 



12.20 N 3 12.22 



12.21 N 1 12.25 

 12.25 N 4 12 26 

 12.27 N 3 12.28 

 12.30 N 4 12.32 

 12.30 a stranger came. 



12.30 N 3 (was disturbed) 12.37 



12.38 N 4 came. 12.40 

 12.42 N 3 



12.47 N 4 12.49 



Thus, during these three hours only six strangers carne. 

 The raisin must have seemed almost inexhaustible, 

 and the watched ants in passing and repassing went 

 close to many of their friends ; these took no notice 

 of them, however, and did not bring any out of the 

 nest to co-operate with them in securing the food, 

 though their regular visits showed how much they 

 appreciated it. 



Again (on the 15th July) an ant belonging to one of 

 my nests of Formica fusca was out hunting. At 8.8, I 

 put a spoonful of honey before her. She fed till 8.24, 

 when she returned to the nest. Several others were 



S. E. 



