46 DIVISION OF LABOUR. 



out, whom we registered as No. 4, another on the 28th, 

 registered as No. 5. Other ants came out occasionally, 

 but not one (,'ame to the honey (except the above men- 

 tioned) from November 28 till January 3, when another 

 (whom we registered as No. 6) began feeding. After 

 this a friend visited the honey once on the 4th, once 

 on the 11th, and again on the 15th, when she was 

 registered as No. 7. 



Table No. 2 is constructed in the same way, but 

 refers to the nest of Polyergus. The feeders in this 

 case were, at the beginning of the experiment, regis- 

 tered as Nos. 5, 6, and 7. On November 22 a 

 friend, registered as No. 8, came to the honey, and 

 again on December 11 ; but with these two exceptions 

 the whole of the supplies were carried in by Nos. 5 and 

 6, with a little help from No. 7. 



Thinking now it might be alleged that possibly 

 these were merely unusually active or greedy individuals, 

 I imprisoned No. 6 when she came out to feed on the 

 5th. As will be seen from the table, no other ant had 

 been out to the honey for some days ; and it could 

 therefore hardly be accidental that on that very evening 

 another ant i^then registered as No. 9) came out for 

 food. This ant, as will be seen from the table, then 

 took the place of No. 6, and (No. 5 being imprisoned 

 on January 1 1 ) took in all the supplies, again with a 

 little help from No. 7. So matters continued till the 

 17th, when I imprisoned No. 9, and then again, i.e. on 

 the 19th, another ant (No. 10) came out for the food, 



