Sentence:  More evolved than the Grays or <WSD>Reptilians</WSD>, the Humanoids seem to feel some sort of kinship with humans and are likely to be kind.[…] Some researchers believe the Grays are merely preparing the way for a full-scale invasion of <WSD>Reptilian</WSD> aliens. 
Meaning of the word marked with <WSD> tags:  A reptilian alien, especially  of a shapeshifting race purported to secretly control the world.