ONE ANOTHER OVER CHASMS. 243 
in a minute. Soon after these began, other ants came 
with them. It was a beautiful day, and all my ants 
were unusually active. At 1 p.m. I counted 10 on the 
sticks at once, by 1.30 over 30, and at 5 in the after- 
noon over 60. They went on working very hard, and 
forming a continuous stream till I went to bed at 11; 
and at 4 in the morning J found them still at work ; 
but though they were very anxious and, especially at 
first, tried very hard to save themselves the trouble of 
going round, they did not think of jumping down, nor 
did they throw the larvz over the edge. 
Moreover, as I had placed some sifted mould under 
the glass, a minute’s labour would have been sufficient 
to heap up one or two particles, and thus make a little 
mound which would have enabled them to get up and 
down without going round. A mound }# inch high 
would have been sufficient; but it did not occur to 
them to form one. 
The following morning (October 18) I put out some 
larvee again at 6 a.M. Some of the ants soon came; 
and the same scene continued till 11.30 a.m., when I 
left off observing. 
Again, on October 22, I placed a few larve in a 
glass, which I kept continually replenished, which 
was suspended 3 of an inch above the surface of the 
frame containing their nest, but only connected with it 
by tapes five feet long. I then, at 6.30, put a L. niger 
to the larve; she took one and tried hard to reach 
down, but could not do so, and would not jump; so I 
