Camel spider
He will eat your ****ing face, as well as everything else on this planet. Contrary to popular belief, its name is not derived from the fact, that its face looks a woman's vagina, but because it'll crawl into your camel toe, just like centipedes do. Therefore it is responsible for a lot of drama among GIs in the Arabian deserts, where these arthropods spend most of their time. This vermin is considered a pest by the native inhabitants, because it throws sand in the eyes and ears of their camels.
Note: Camel spiders, while universally feared by GIs, pose no threat whatsoevar, a little bit like Saddam's stockpiles of WMDs.