374 EXPERIMENTS ON CO-OPERATION. 
At 3.31 — returned again and took another. 
3.34 ” ” 
3.36 ima ” 29 
At 4.10 another ant came to the middle cup. 1 
imaprisoned her. 
At 4.45 — returned again and took another. 
5.50 9 3 
6. 2 6. 2 #5 8 
6.17 ” ” 
6.26 ” ” 
6.46 ” ” 
6.52 ” ” 
a4 4 ” ” 
tare ” ” 
7.13 ” ” 
7.18 » » 
7.48 7.48 35 9 
After this they were not watched any more. It wiil 
be observed that the second ant made many more visits 
than the first—namely, forty-two in about eleven hours, 
as against twenty-six in eleven hours and a half. 
During this time two ants came to the larve in the 
cup they were visiting, and three to the other two cups. 
The following case is still more striking. 
11, 1875, at 11 a.M., 1 put a Lasius flavus to some pupe 
of the same species, but from a different nest. She made 
eighty-six journeys, each time carrying off a pupa with 
the following intervals. Commencing— 
Atll. 0 At 11.29 again. 
1]. 5 she returned. 11.49 ,, 
11. 9 returned again. 11.55 ,, 
11.16 again. 12.0 ,, 
11.20 ,, 12,5. ,, 
11.24 ,, 12.16 ,, 
11,26", 12.30 
On July 
