RELATIONS WITH OTHER ARTHROPODA. 61 
ently liquid food is consumed soon after being brought into the for- 
micary, as evidenced by the following observation : 
Some fresh honey was placed upon the food table of an artificial 
formicary, and when the first worker was observed to leave the honey 
the top of the formicary was removed and her actions observed. 
Upon entering the colony she was met by three other workers, all 
of which placed their mandibles to hers. As she regurgitated the 
liquid they sipped it up. When one of these workers had received a 
sufficient quantity she retired and another took her place, as many 
as four or five workers sometimes feeding at once. The foraging 
worker in this manner supplied about 15 others with food, after 
which, her supply being apparently exhausted, she left the group of 
assembled feeders and went her way, leaving some of them hungry 
and still unsatisfied. 
RELATIONS WITH OTHER ARTHROPODA. 
FORMICID.E. 
It may be said in general that the Argentine ant will not tolerate 
the presence of other species of ants within its domains. There are 
a few exceptions to this rule. In 1908 Mr. G. A. Runner and the 
junior author found a small colony of Monomorium minimum Buck- 
ley living in the same tree stump with a colony of Argentine ants at 
Baton Rouge. The Monomorium colony possessed a number of young 
stages and appeared to be unmolested by the Argentine ants. The 
following season, however, the Argentine ants were in full possession 
of the stump, and no trace of Monomorium could be found. During 
the same summer another small colony of M. minimum was noticed 
living in a fig tree in territory heavily infested with the Argentine 
ant. This was also at Baton Rouge. This colony was observed for 
several weeks, but finally died out, though it could not be determined 
whether the Argentine ants were responsible for its annihilation. 
In another case a log was split open, disclosing vigorous colonies 
of both Iridomyrmex Jiumilis and M. minimum. Whether the ants 
were occupying the same chambers or whether the nests were in 
close but disconnected chambers could not be ascertained, but the 
Monomorium workers were seen to pick up and carry away the larvae 
of Jiumilis with as much solicitude as they did their own. Just what 
relationship obtains between these two species we have not been 
able to determine, but certain it is that Jiumilis tolerates this small 
species to a much greater extent than it does any other ant. At 
Baton Rouge Monomorium minimum still seems to maintain its 
normal abundance, and this certainly can not be said of any other 
species of ant. 
