Schizo (1976)
A newly married woman becomes convinced someone from her past is stalking her, but nobody believes her until the bodies start to pile up
Phase IV (1974)
Desert ants suddenly form a collective intelligence and begin to wage war on the inhabitants It is up to two scientists and a stray girl they rescue from the ants to destroy them
The Four of the Apocalypse... (1975)
Four petty criminals, three men and a woman, wander through the trackless terrain of the Wild West Utah and are hounded by a sadistic bandit