Phase IV

Phase IV is a 1974 BritishAmerican science fiction horror film. The only featurelength film directed by graphic designer and filmmaker Saul Bass, it stars Michael Murphy, Nigel Davenport and Lynne Frederick.

Due to an unknown cosmic event, listed in phases, ants have undergone rapid evolution and developed a hive mind. A scientific team begins investigating strange towers and geometrically perfect designs that ants have built in the desert. Except for one family, the local human population flees the strangely acting ants. Scientists James Lesko and Ernest Hubbs set up a computerized lab in a sealed dome located in an area of significant ant activity in Arizona. The ant colony and the scientific team, along with the holdout family, fight each other though the ants are the more effective aggressors.The narrative uses the scientific team as the main protagonists, but there are also ant protagonists going about their duties in the colony. The ants immunize themselves to the humans chemical weapons and soon infiltrate their lab. Teams of ants penetrate the computers of the lab and short them out. After Lesko decodes an ant message, Kendra Eldrige, a young woman who had taken refuge with the scientists becomes convinced that her actions have enraged the ants. Seeking to save the two scientists, she abandons the lab and apparently sacrifices herself. ........

Source: Wikipedia