278 HYMENOPTERA 



cession. Indeed, it may here be said that I have never 

 seen Dorylus carrying its larvae on safari, only the pupae ; 

 nor does one ever see a queen travelling. Is it possible 

 that a column such as is above described is analogous 

 to a swarm of bees, but that instead of taking a queen 

 with them the members of the swarm carry pupae, from 

 one of which a queen will emerge when they have ex- 

 cavated a new nest ? It is curious that where there are 

 large and small ants there should not be some differen- 

 tiation of function. Quite small individuals are seen 

 struggling along carrying enormous pupae, while lusty 

 fellows of the biggest size appear quite content whether 

 they are carrying a small individual or one of their own bulk. 



Although, on the whole, the column is an orderly one, 

 occasionally considerable confusion is caused by indi- 

 viduals running back against the stream ; possibly they 

 are "returning empty" ! If they are of very small size, 

 they are often seen to be unable to make headway against 

 the hurrying multitude, and unless they run quite at 

 the edge are at length compelled to turn round and run 

 with the rest. A very large individual, however, since 

 it stands well above the small ones, can often run against 

 the tide, for the small ones can run under it, between 

 its legs. 



But every column of Ensanafu that one sees is not 

 engaged in changing camp ; most often they are either 

 going out to hunt, or returning laden with spoils. 



When they have reached the hunting ground the main 

 column breaks up into minor streams, and the ants swarm 

 over the ground, investigating every nook and cranny 

 and climbing up bushes. 



If one is in the forest when they are hunting, one often 

 first becomes aware of it by hearing a peculiar pattering 

 noise, caused by the countless ants which have run up 

 branches to the extreme tip, and finding no prey there 

 drop off and fall on to the leaves below. 



