According to Wikipedia: "Bug-eyed monster is an early convention of the science fiction genre. Extraterrestrials in science fiction of the 1930s were often described (or pictured on covers of pulp magazines) as grotesque creatures with huge, over-sized or compound eyes and a lust for women, blood, and/or general destruction."

I love that description "a lust for women, blood, and/or general destruction" and I deliberately gave my chupacabras bug eyes as tribute to the old pulp term. I am happily writing "bug-eyed monster" stories. The first BEM book "Siege of Station 19" drops in February from Necro publications.