‘ormation of Colonies by Lasius fuliginosus. 667 
reconciled to the 2, she was introduced with them into 
nest No.1. <A fresh 9 or two which had not seen her 
before threatened her with its jaws, and she was a little 
attacked, but one of the old $9 protected her, getting 
between her and the others, and pulling them away by 
the leg. 
On December 21st the 2 was surrounded by a number 
of 89. 
On December 22nd she was observed to be fed by some 
of the $9 whilst others cleaned her. 
On December 23rd one § threatened her with its jaws, 
and was often pushed away by the others. Another % 
held her by the leg for some time. 
On December 24th another of the wmbratus winged 2 
was killed by the 69. It may be mentioned that when 
the wmbratus winged 22 met the fuliginosus 2 they 
opened their jaws at her, but did not attack her. When they 
meet each other they salute in a rather ridiculous manner. 
On December 30th the /wliginosus 2 was quite accepted. 
She was always surrounded by a large group of wmbratus 
3%, fed by them, and continually cleaned. She stroked 
all those near her with her antennae, and seemed per- 
fectly happy and contented. 
On March 15th, 1911, we exhibited the two wmbratus 
nests at the meeting of the Entomological Society of Lon- 
don, to show that both colonies had accepted /uliginosus 
22 as their queens. 
All went well till April, when a number of the wmbratus 
89 began to die off in nest No. 1. On April 20th a 
further visit was made to Weybridge, and a large number 
of 89 were brought home from the old nest, and some 400 
were introduced into this nest. The new $9 were quite 
friendly with the old ones, but unfortunately they attacked 
the fuliginosus 2. She was removed and isolated with 
24 of the new 9%. They refused to accept her, and on 
April 17th she was still being attacked ; it was impossible 
to get her reinstated in the wmbratus nest. 
On April 21st she was returned to her own /fuliginosus 
nest. The $9 were much excited, and she was much 
pulled about. She was eventually lost sight of among 
the crowds of ants. It is, however, clear that if so many 
new $9 had not been introduced together into the wm- 
bratus nest, the fuliginosus 2 would have laid her eggs 
and brought up her brood in this nest. 
