The story involves a small town cosmetic company chemist (Lugosi) who is upset at his wealthy employers, because he feels they have denied him his due share of company success. To get revenge, he breeds giant bats. He then conditions them to kill those wearing a special after-shave lotion he has concocted. He cleverly distributes the lotion to his enemies as a "test" product. Once they have applied the lotion, the chemist then releases his Devil Bats in the night, which kill his two former partners and three members of their families. A hot shot big city reporter gets assigned by his editor to cover and help solve the murders. He (O'Brien) and his bumbling photographer (Kerr) begin to unwind the mystery with some comic sidelights. The mad chemist is, predictably, done in by his own shaving lotion, and by his own creation—the dreaded Devil Bat.
PRC was a young studio when it planned to enter the horror film genre, which had been neglected by the major studios during 1937 and 1938. Lugosi was beginning a come-back when he signed a contract on October 19, 1940, with PRC's Sigmund Neufeld to star in the poverty row studio's first horror film. The shooting of the film began a little more than one week later. PRC was known for shooting its films quickly and cheaply, but for endowing them with a plentiful amount of horror, and The Devil Bat established this modus operandi - From Wikipedia
THIS IS THE SPECIAL COLORIZED VERSION OF THIS FILM
Say what you may about colorization I think when used on certain types of films it adds an element of surealism.
THE DEVIL BAT
JEAN YARBROUGH (1940)
PRODUCERS RELEASING CORP. (PRC)