Gegeines

Gegienes are the Greek name for Earthborn. They have six arms each, and wear nothing but leather loincloths.

Mount Diablo
Once Jason, Piper, and Leo got to Mount Diablo, they met Enceladus, who summoned Earthborn straight from the ground. Leo destroyed five of them with construction equipment, and the last one destroyed by Piper. Once they got killed, they left some nasty pieces of loincloth behind.

The Wolf House
After Jason, Leo, and Piper got their Bell 412 helicopter destroyed, Thalia met up with them. She told them about how they were surrounded now, and then killed one of the Earthborn with her final arrow. Later, Piper fought the rest of them, and returned all of their essencess to Tarturus. Unfortunaly, after Porphyrion rose, they came back to life.