******SPOILERS****** Coming back from outer space a rocket launched from the southern part of the United States crashes into the African continent with a Queen Wasp. The wasp was on the rocket to see how it would react to the weightlessness and cosmic rays from space. The Queen Wasp grew thousands of times it's size forming a hornet's nest at the base of a volcano in an area of the jungle known by the local natives as "Green Hell".
The movie "Monster from Green Hell" follows the usual pattern of monster movies made in the 1950's with one major exception. The giant wasps are done in not by mankind technology but by the forces of nature via an volcanic eruption that buries them in a river of lava.
Meager special effects but better then average acting for a low-budget monster film made "Monster from Green Hell" watchable for the 70 odd minutes that it's on the screen. All the efforts to find and destroy that wasps in the movie turned out to be for nothing since all that had to be done was to let nature run it's course.
Cheap and unconvincing effects made the giant wasps look and act ridicules in their attacks on the natives and safari members with the real action highlight in the movie was an attack by thousands of native warriors on the safari. Those scenes was far more effective and scary then any of the giant wasp attacks.
Good acting by Jim Davis and Robert E. Griffin as the two American doctors on the safari with Joel Feuellen and Eduardo Ciannelli as their native and Arab guides with Vladimir Skoloff, who ended up killed by the wasps off screen. There's also in the movie Barbara Turner as Skoloff's young daughter who looked and sounded like a young Igrid Bergman. The special effects of the giant wasps was only so/so but there was a very good scene with a giant wasp battling it out with a large python that was a lot like the scene in "King Kong" between the giant ape fighting with a pre-historic snake-like creature.
The last five minutes or so of the movie was shot with an beige or orange tint to give the volcanic eruption at the end of the film a fiery look to it.