Black ants do eat termites (also known as white ants) as they are natural enemies. The predation is slow and can last from several hours to few days. The intensity depends upon the population of black ants compared to that of termites and availability of alternate food resources.
Being weaker than ants, termites have evolved by developing protective tubes and producing soldier termites that defend the colony in an ant attack. These attacks are frequent and involve the killing of the termite queen. The termite eggs are used to feed the ant’s young. However, a large termite colony can never be fully consumed by ants.