Classic TV - Tales Of Tomorrow - "Fury Of The Cocoon" (1953)

After a scientific expedition to a meteorite impact site in the jungle disappears, a three-man relief team sets off for the expedition's camp. The lone survivor tells them that the expedition was attacked by invisible insect-like creatures that came out of the meteorite. The scientists must find a way to defeat the insects before they are overwhelmed.
https://www.imdb.com/title/tt0717064/plotsummary?ref_=tt_ov_pl

This video is in the Public Domain.