These beetles are of the Rhinoceros Beetle kind. They have black heads and bodies along with green shells for their wings. Their weapon of choice is a slingshot that shoots curled up millipedes. They also carry fireflies for flashlights.
When close, they ram you with their horns horizontally or upwards. When far, they shoot a curled up millipede at you from their slingshots. Like all flashlight guards, they attack you if hit more than 2 times.