The Black Scorpion (film)

The Black Scorpion is a 1957 blackandwhite MexicanAmerican horror film, produced by Jack Dietz and Frank Melford, directed by Edward Ludwig, and starring Richard Denning, Mara Corday, Carlos Rivas, and Mario Navarro. The film was released by Warner Brothers Pictures. Of special note, the films stop motion animation special effects were created by Willis OBrien.

They take the infant to San Lorenzo and give it to friends of the childs now missing parents they are welcomed by the villages priest, Father Delgado. In addition to the disappearances of locals and the destruction of their homes, there have been wholesale slaughters of livestock and strange roaring noises in the night. The villagers believe the culprit to be a demon bull and have been pestering Delgado for divine assistance. Undaunted, Hank and Arturo begin their geological survey as members of the Mexican army, led by Major Cosio, arrive in San Lorenzo to begin disaster relief efforts. Hank meets and falls in love with local rancher Teresa Alvarez and makes friends with a young boy named Juanito.The volcano erupts again and the true culprits behind the disappearances and deaths are revealed as giant prehistoric scorpions. After killing a staff of telephone repairmen, the scorpions turn their attention to San Lorenzo itself, with the guns of Major Cosios troops having no effect on them. The next morning, the scorpions have returned to their underground lair which, in addition to the scorpions, is home to giant worms and spiders, leaving the authorities to seek the help of renowned entomologist Dr. Velasco. It is up to him, Hank, and Arturo to figure out a way to either destroy the scorpions or seal off the entrance to their cavern home, before more innocent lives are lost. ........

Source: Wikipedia