BUCKINGHAM. 



DIVISION OF LABOR AMONG ANTS. 



457 



number of deiilated queens, and lines 6 and 8 the per cent of times 

 that these were respectively active in tending the young. 



2. Observiitiom. — I may note here the following incidental 

 observations : 



(1) Ants often appeared to touch the young, even with the anten- 

 nae, without seeming to notice them. 



(2) Unless violently disturbed, the ants did not remove the young 

 to a definitely safe place, but wandered about with them in their mouths 

 in an apparently aimless way. 



(3) After an experiment had continued for some minutes, the ants 

 were not as much disturbed by the current of air as they were at first. 



TABLE IV. 



This is in agreement with Turner's (: 07, p. 408) statement in regard 

 to sound, and Fielde's (-.OS*', p. 493) in regard to other stimuli. 



Unfortunately the number of individuals in a colony in this experi- 

 ment was small. However, it was found (Table IV) that only a small 

 per cent (17, 8, 31, 9) of the workers were occupied in tending the 

 young. The per cent of workers engaged in this activity seems to be 

 quite independent of the number of individuals in a colony. 



A similar conclusion to that reached in regard to foraging (pp. 453- 

 455), — viz. that a few individuals are more active than the rest, — 

 is also to be drawn from my experiments on tending the young, as 

 shown in the third column of Table III (p. 455). The methods used 

 in experimenting allow no minus results in this activity, or in building 

 (column 4), such as were found in foraging. Out of 46 indviduals 

 experimented with, 7 did not share at all in tending the young, and 



