Q4: ARCHITECTURE OF ANTS, 
Having then noticed the movements 
of these insects during the night, I found 
they were almost always abroad and en- 
gaged about the dome of their habitation 
after sun-set. ‘This was -directly the re- 
verse of what I had observed in the con- 
duct of the fallow ants, who only go out 
during the day, and close their doors in 
the evening. The contrast was still more 
remarkable than I had previously sup- 
posed, for upon visiting the brown ants, 
some days after, during a gentle rain, 
I saw all their architectural talents in full 
play. | 
As soon as the rain commenced, they 
left, in great numbers, their subterranean 
) residence, re-entered it almost immedi- 
ately, and then returned, bearing between 
their teeth pellets of earth, which they 
deposited on the roof of their nest. I could 
not, at first, conceive, what this was 
meant for, but at length I saw little 
walls start up on all sides with spaces 
left between them. In several places, 
columns, ranged at regular distances, an- 
