Arachnobat

From Willipedia

Upon sight of the beast itself, I perceived that so long as this scourge doth infest the earth, we are truly alone. None can save us now. - L. Tanner (1729)

OH SHITBALLS, IT'S ON MY NECK! IT'S ON MY FUCKING NECK! - unknown

A hideous bat-spider abomination. No living example has ever been captured, but rumors of its existence have lingered among Berkshire residents since well before the arrival of Ephraim Williams.