Peter Cushing stars in this British gothic chiller about a scientist whose daughter transforms into a monstrous, blood-thirsty Death’s-Head moth. As bodies pile up in Victorian England, a determined inspector uncovers a tale of twisted science, murder, and horror lurking beneath genteel society.

88 Films

A series of blood-thirsty murders is investigated by Inspector Quennell and Sgt. Allan of Scotland Yard. But when their search for the killer leads them to the door of strange entomologist Dr. Carl Mallinger and his beautiful daughter Clare, events take a nightmarish turn in this 19th-century tale of transformation, monsters, and terror.

Starring the legendary Peter Cushing and directed by Vernon Sewell (Curse of the Crimson Altar) this Tigon cult classic offers up a heady mix of late 60s British horror.

Från IMDB:
A scientist genetically engineers a creature that transforms between a Death's-head moth and a woman. The creature poses as the scientist's daughter to lure victims when in human form, then feeds on their blood as a moth.