Voir Transformers, The Complete First Season (25th Anniversary Edition) - Episode 15

A discovery has been made deep in the "Demon Swamp" on the island of Bali: large robotic insects are eating everything in their path and terrorizing the people of the island. Megatron soon discovers they are an ancient breed of Decepticon and forms an alliance with the powerful Insecticons—an alliance that could mean the end of the Autobots.