Unidentified small-headed humanoid species (Men in Black II)

This unnamed humanoid species is known to resemble Humans, except for the shape and size of their heads. A member of this species worked in a post office while Agent K was a postmaster.

Biology
Members of this species are hairless humanoids, mostly resembling Humans, although their heads are notably smaller than that of a Human, appearing rather disproportionate to the rest of their bodies. However, their faces have Human-like proportions, making them appear quite large for their heads. Additional features include entirely dark eyes and a lack of external ears.