The Devil Bat (1940)

A mad scientist develops an aftershave lotion that causes his gigantic bats to kill anyone who wears it.

Director:

 Jean Yarbrough (as Jean Yarborough)

Writers:

 John T. Neville (screenplay), George Bricker(original story)

Stars:

 Bela Lugosi, Suzanne Kaaren, Dave O'Brien - via IMDB

https://archive.org/details/Devil_Bat_movie