Temporary Social Parasitism and Slavery in Ants. 177 
On April 2nd I brought up from Darenth Wood some 
fusca 88 and 3 2 9, which I had dug up out of a small 
sandy bank. These I fixed up in a “Crawley” nest. 
On April 17th I introduced a rufa 9, taken at Wellington 
College on 16th, into the last compartment (the fourth) 
of the nest. The fuscas were in the second compartment, 
In the morning of April 18th, the rufa 2 was in the 
first compartment with 3 fusca 9 9 and was not being 
attacked. She must have passed through the fusca 
nest during the night. During the day she was attacked 
by three other $$ who entered her compartment. She 
was not at all aggressive, and tried to conciliate them 
by stroking them with her antennae. Two of them 
left her alone after a time, but the third held her by 
the front leg for the greater part of the day. Another § 
tried to drag her into the second compartment, and 
eventually she went in and was accepted by the /fuscas, 
remaining with them. On June Ist one of the fusca 2 9 
was dead, bitten in two! This was probably the work of 
the rufa 2; she often sat with her head over one or the 
other of the three fusca 22. On June 20th the rufa 2 
unfortunately died, Eggs had been laid, but whether by 
the rufa 2, or the fusca 2 2 alone, or by both species, I am 
unable to say. Many of the $4 died during the summer, 
and on July 20th only 388 remained with the 2 fusca ? 9. 
Seven larvae and two pupae in cocoons were present. 
The fusca 2 $ helped to carry about the larvae and pupae. 
All the dead remains of the fusca 35 and rubbish had been 
carried into the first compartment, but the abdomen of the 
dead rufa 2 was always carried about by one of the $9, and 
placed with the pupae. Two more of the fusca $9 and the 
larvae and pupae died. ‘To-day, November 26th, the one 
fusca 8 andthe 2 $8 are still alive. This § sits apart 
from the 2 29, and always carries the abdomen of the 
rufa 9 in her jaws! 
On August 21st, Mr. Taylor and I again visited Park- 
hurst Forest. During the day we found a very small rufa 
nest in an enclosure of young fir trees. It consisted of 
a small mound, only 8 or 9 inches in diameter and about 
3 inches high, but built of vufa materials in the usual 
way. It was quite evident that this was a new nest, so I 
decided to dig it up and investigate the contents. The 
nest reached a depth of about only six inches into the 
earth. It contained about 150 rufa 5 9, most of them very 
TRANS. ENT. SOC. LOND. 1911.—PARTI. (MAY) N 
