The Myrmelachista chilensis is a cologne with a monogyny type. It has a fast development speed and can have several hundred workers in the colony. The queen is 6.5-7.5 mm in size while the workers are 3.5-6 mm. The ants are black and brown in color. They feed on food insects, fruit, and syrup. They require humidity levels of 30-50% in the arena and 50-70% in the nest.