474 PROCEEDINGS OF THE AMERICAN ACADEMY. 



the intermediates, are more addicted to regurgitating, and the majors 

 to receiving regurgitated food. 



7. In tending the young, the majors are least active, the intermedi- 

 ates more so, and the minors most so. When excited, larger ants enter 

 into this activity somewhat more than they do under normal conditions. 



8. In building, all sizes were seen carrying earth, though the two 

 smaller sizes especially excelled in this. In digging, the intermediates 

 were also the more active. The evidence in regard to building is 

 somewhat conflicting, the field notes indicating minors and the Barth 

 nests majors and intermediates as the more active. As the captured 

 ants can, after all, be studied by more exact methods than those in 

 the field, I am inclined to accept as correct the results obtained with 

 the use of nests. 



9. Carrying and being carried seem to take place most irequently 

 when the ants are somewhat excited, either by some unnatural dis- 

 turbance or by the presence of food. These activities are, however, 

 not very common. The process is sometimes one of dragging, but 

 often it is one of actually carrying, and the minors and majors seem 

 often to be transported by other ants, and the intermediates to be car- 

 rying them. 



10. All three classes took part in licking, but the majors slightly 

 less than the other two classes. The majors seemed never to be licked, 

 and the minors seldom, the intermediates being most often the objects 

 of this activity. The evidence on this activity was, however, slight ; 

 nevertheless, it is probable that majors, too, are licked. 



11. Ants of all sizes may surround the queen. 



12. While all classes will attack an intruder when the nest is dis- 

 turbed, the majors are the most savage. 



13. There is nothing in C. herouleanus pictus resembling the process 

 of guarding seen in Colobopsis. 



14. There is no hard and fast distinction between classes, either 

 morphologically or physiologically — for in each activity there is a per- 

 fectly graded series with no break into classes — but only a preponder- 

 ance of ants of certain sizes in certain activities. 



15. The duties in which the small ants, i. e. intermediates and 

 minors, excel may be called the "household duties," and foraging. 



10. The majors are relatively inactive in all occupations except 

 fighting, while the other two sizes taken together are very active. 



