140 YOUNG ANTS RECOGNISED EVEN 
was being dragged about by an antenna. 2.30, both 
were being attacked. At 2.45 one was dragged out of 
the nest. 
I then put back one of the old ones; as might have 
been expected, she was received quite amicably. 
I then tried the same experiment with another 
species, Lasius niger. I took some pupz from two of 
my nests, which I knew not to be on friendly terms, 
and which I will call 1 and 2, and confided each batch 
to three or four ants taken from the other nest. When 
they had come to maturity I introduced them into the 
nests as before. 
They were taken from their nest on September 20; 
and the results were as follows. 
Pupz from nest 1 confided to ants from nest 2. 
September 20.—Put one of the young ones into 
nest 2 at 7.15 a.m. Several at once threatened her. 
At 7.25 one of the ants seized her by an antenna, and 
began dragging her about, 7.30, she was still being 
dragged about. 8, ditto. 8.15, she was now being 
dragged about by three ants. 8.30, she was still attacked. 
9, ditto. At 9.15 she was dragged out of the nest. 
September 23.—Put two of the young ants into 
nest 1 at 9.15 a.m. One was at once attacked, and 
the other a few minutes afterwards. 9.45, both were 
attacked. 10,ditto. One was now dead and hanging on 
toa leg of assailant. 10.15 ditto. 10.45, both were still 
being dragged about. 
At 11 aM. I put into nest 2 three more very young 
