Species (1995)
Species is a 1995 American science fiction horror film directed by Roger Donaldson, and starring Natasha Henstridge, Ben Kingsley, Michael Madsen, Alfred Molina, Forest Whitaker and Marg Helgenberger. The film is about a group of scientists who try to track down and trap a killer alien seductress before she successfully mates with a human male.
More at Wikipedia.