SIR JOHN LUBBOCK ON ANTS, BEES, AND WASPS. 
131 
At the beginning of August I brought in a nest of Lasius 
niger containing a large number of pupae. Some of these I placed 
by themselves in charge of three ants belonging to the same 
species, and taken from a nest which I have had under observa- 
tion for rather more than 10 years. On the 28th August, I took 
12 of the young ants, which in the meantime had emerged from 
the separated pupae, selecting some which had all hut acquired 
their full colour. Four of them I replaced in their old nest, and 
four in that from which their nurses were taken. 
At 4.30. In their own nest none were attacked. 
In their nurses’ nest one was attacked. 
5. In their own nest none were attacked. 
In their nurses’ nest all four were attacked. 
8. In their own nest none were attacked. 
In their nurses’ nest three were attacked. 
The next day I took six more and marked them with a spot 
of paint as usual, and at 7.30 replaced them in their own nest. 
At 8 I found 5 quite at home. The others I could not see, 
but none were attacked. 
8.30 „ 5 
9 „ 3 
10 „ 4 
11 „ 5 
12 „ 3 
1 „ 3 
4 „ 4 
7 „ 1 
9 „ 2 
55 
55 
55 
55 
55 
55 
55 
55 
55 
55 
5 * 
55 
55 
55 
55 
The next morning I could only see two, but none were being 
attacked and there were no dead ones. It is probable that the 
paint had been cleaned off the others, hut it was not easy to find 
them all among so many. At any rate none were being attacked 
nor had any been killed. 
These observations, therefore, quite confirm those previously 
made, and seem to show that if pupae are taken from a nest, kept 
till they become perfect insects, and then replaced in the nest, 
they are recognized as friends. 
"When we consider the immense number of ants in a nest> 
amounting in some cases to over 500,000, it is a most remarkable 
fact that they all know one another. If a stranger, even be- 
