is an American film released in 1971 which combines elements of documentary, science fiction, horror and apocalyptic prophecy to present a gripping satirical depiction of the struggle for survival between humans and insects. It was conceived and produced by David L. Wolper, directed by Walon Green and written by David Seltzer, who earned a Writers Guild of America Award nomination for his screenplay.
Available on DVD, Blu-ray, and a segment free on you tube.
Saw it in NYC when it was released...left the theater looking to buy a flame thrower.
That's the film I was thing of in my post above to another.