134 ANTS REMOVED AS PUP, AND RESTORED 
them had been almost completely cleaned. One was 
attacked for about a minute soon after 11, and another 
a little later; but with these exceptions they were 
quite amicably received, and seemed entirely at home 
among the other ants. 
Thus every one of these thirty-two ants was amic- 
ably received. 
These experiments, then, seem to prove that ants 
removed from a nest in the condition of pup, but 
tended by friends, if reintroduced into the parent nest, 
are recognised and treated as friends. Nevertheless 
the recognition does not seem to have been complete. 
In several cases the ants were certainly attacked, 
though only by one or two ants, not savagely, and only 
for a short time. It seemed as if, though recognised 
as friends by the great majority, some few, more 
ignorant or more suspicious than the rest, had doubts 
on the subject, which, however, in some manner 
still mysterious, were ere long removed. The case 
in which one of these marked ants was carried out of 
the nest. may perhaps be explained by her having been 
supposed to be ill, in which case, if the malady is con- 
sidered to be fatal, ants are generally brought out of 
the nest. 
It now remained to test the result when the pupe 
were confided to the care of ants belonging toa different 
nest, though, of course, the same species, 
I therefore took a number of pupe out of some of 
my nests of Formica fusca and put them in small 
