Very cool picture. Can't really go wrong with a praying mantis in general. I'm not seeing a whole lot of high contrast however and I think the subject, knowing that it is usually a gorgeous vivid green, is not being displayed to its best advantage in a black/white tone. The lighting is good, fairly even for the most part, composition works to show off the body very well. The focus is a bit sketchy, I wish the whole insect was in sharp focus instead of the middle part of its body. I definitely think the high contrast is missing here though as the whole image seems to be a wash of grey for the most part. I gave a 5.
The histogram and my eye read this shot as high key not high contrast, but man I love it. Mantises are my favorite insect. I can only give you a 5 though.