ARTIFICIAL MIXED NESTS OF ANTS 325 



habitat a congenial one, might form a mixed nest through an 

 accidentally close association of their newly-hatched members. 



Were the occupants of my artificial nests free to seek the 

 habitation most agreeable to each species, they would doubtless 

 soon separate. Perhaps they would never quarrel with each 

 other on meeting ; but they would certainly fight with all ants 

 whose age and lineage were not the same as their own, or else 

 the same as that of their quandam associates in the artificial 

 mixed nest. 



MARINE BIOLOGICAL LABORATORY, 



WOODS HOLE, MASS., September, 1903. 



