Alien (Earth vs. the Flying Saucers)

This unnamed humanoid species were almost entirely wiped out by the destruction of their solar system, with their last members being killed in a failed attempt to occupy Earth.

Biology
Most of the aliens' biology is unknown, but it is known that they are humanoids with heads resembling that of the classic Grey. They have hairless heads with flat noses, perpetually frowning mouths, large, dark eyes, no external ears, and thin, wrinkled greyish-brown skin. However, the aliens who met with Humans had artificially prolonged their lifespans with life support suits, so it is possible that their natural appearance is different from what was seen when unmasked. When killed, their bodies would soon dissolve into nothingness.

Appearances

 * Earth vs. the Flying Saucers (1957)