Reetou

The Re'tu are an insect like species who 180 degrees outside of the human visibility spectrum, rendering them completely invisible. They are a largely peaceful race from the planet Retalia. When the Goa'uld discovered them, they feared the potential threat that the invisible species could pose. They devastated Retalia, killing most of the Re'tu, but a number survived. After the devastation, the Re'tu split into two camps: those loyal to the Re'tu Central Authority, who believed that they should fight the Goa'uld in force, and the Re'tu Rebels, those who believed that the Goa'uld should be battled with "attrition"&mdash;wiping out all potential hosts.