Our local channel 56 plays old classic monster movies every Saturday night. Tonight they had a feature called The Deadly Mantis. I had never heard of it. It was from 1957. Of course, by today's standards, this movie wasn't scary at all, but it was kind of fun to watch. (and I'm too big of a baby to watch modern horror movies, so this was actually just right for me.)
I found an original trailer for the movie, and tried to get it to play right in this post, but my computer didn't like that, so hopefully the link will work for you.