Who knows the artist w/o googling it? I've had a reproduction of this since about 1970. Wish I could have afforded a true print back then.
Mantises look like something HR Giger would have drawn for a science fiction killer creature if God hadn't made one first. Giger's would have been 15 ft tall, mean on general principle, and 'hungry.' Maybe not so-hungry after reproducing and then eating her mate's head...