Insectoid

Living beyond the Omega-4 mass relay in the Terminus Systems, the mysterious Collector species is glimpsed so rarely as to be taken for a myth by most in galactic society. In reality, Collectors are human-sized insectoid bipeds and can resemble massive winged beetles. They are a terrifying force in the galaxy, responsible for the murder of hundreds of thousands.

Source: wiktionary

Two hundred Earth years earlier, a race of Insectoids discovered them as the Squishys were sending their first probes to other planets in their own star system.

Source: wiktionary