My blogging buddy Autumnforest at Ghost Hunting Theories (link) has written a couple of posts about classic sci fi of the 1950s. Inspired by that lovely blogger/author, I had to pick an equally lovely woman of the sci fi/horror B movies. I choose the giant bug battler Mara Corday (link).
Tarantula (1955) and The Black Scorpion (1957). Of course, she wasn't limited to just giant bugs, she also tangles with a big bird in The Giant Claw.