666 H.St. J. K. aoe and W. C. Crawley on the 
On December 8th, 1910, we visited a nest of wmnbratus 
at Weybridge, which was in the ground under the old 
root of a tree. This contained a number of $9 and a lot 
of winged 29, but we were unable to find a deiilated 
queen. It was unfortunate, as it would have been very 
interesting to prove if the wmbratus § was killed either 
by the fuliginosus 2, or herown 39. However, we intend 
to carry out further experiments when the wmbratus 2 is 
present in a nest. 
We took about 400 $9 and 30 winged 29, which we 
divided into two lots, and established them in two separate 
‘Crawley ” plaster nests. 
Experiment No. 1. 
On December 10th, 1910, a detlated fuliginosus 2 was 
introduced into the first chamber of wmbratus nest No. 1. 
The wmbratus 99 had already killed and cut up five of 
their own winged 2 2. The fuliginosus 2 endeavoured 
to join the wmbratus 99 at once, forcing her way into 
the most crowded chamber. One © saluted her, another 
dragged her by the jaws through the passage into another 
chamber ($9 always drag their own 2 by the jaws, not by 
the legs or antennae, when they wish her to move into 
another place). Eventually she was attacked by many 
39, held by the legs and antennae, and was dead in the 
evening. As will be seen, she was not attacked at once 
or in the same way as is a strange ant in another nest. 
For instance, one of the wmbratus 2 ? was introduced into 
the fuliginosus nest. She was instantly set upon and 
killed in a few minutes. 
Experiment No, 2. 
On December 13th a dealated /uliginosus 2 was put 
into a small single-chamber plaster nest with a dozen 
umbratus 39 taken from “Crawley” nest No. 1. She was 
threatened by the $9 with their jaws, and a little attacked. 
She never tried to run away, but always approached the 
O98 and endeavoured to conciliate them. She stood still 
when attacked by a §, and stroked and caressed it with 
her antennae. When aQ endeavoured to bite at her 
waist she protected it by crossing her hind legs over her 
back, and when at the neck by pressing the head back 
close against the thorax. By December 20th, the 39 
having been increased to 22, and all seeming to be 
