Instruct: Classify a given review as either positive or negative.
Query: An overlooked gem of 70's Sci-fi.

Phase IV is one of those slowly developing plot movie that really captures you, provided you are willing to follow at an ant's pace.It's about ground beetles with a vast store of intelligence that go up against man. It takes place in the desert where two scientists prepare to combat them. Those who want a cerebral, plot and dialogue based, tense and suspense-filled Science fiction will probably love this film. Those who despise insects and dirt will probably hate this film.A Field Guide to InsectsRaid Ant Roach Killer