Foraging ants: their method of hunting.
Ant-thrushes.
They attack the nests of other ants.
Birds' nests, how preserved from them.
Reasoning powers in ants.
Parallel between the Mammalia and the Hymenoptera.
Utopia.

I FOUND at Greytown the mail-boat of the Chontales Gold-Mining
Company, which came down monthly in charge of Captain Anderson, an
Englishman who had knocked about all over the world. The crew
consisted of four Mosquito negroes, who are celebrated on this
coast for their skill as boatmen. Besides the crew, we were taking
three other negroes up to the mines, and with my boxes we were
rather uncomfortably crowded for a long journey. The canoe itself
was made from the trunk of a cedar-tree (Cedrela odorata). It had
been hollowed out of a single log, and the sides afterwards built
up higher with planking. This makes a very strong boat, the
strength and thickness being where it is most required, at the
bottom, to withstand the thumping about amongst the rocks of the
rapids. I was once in one, coming down a dangerous rapid on the
river Gurupy, in Northern Brazil, when we were driven with the full
force of the boiling stream broadside upon a rock, with such force
that we were nearly all thrown down, but the strong canoe was
uninjured, although no common boat could have withstood the shock.

Having determined to go up the river in this boat, we took
provisions with us for the voyage, and one of the negroes agreed to
act as cook. Having arranged everything, and breakfasted with my
kind friends, Mr. and Mrs. Hollenbeck, I bade them adieu, and