Not spider, but solpugids. (What the heck is that?) 
"Myth: In the deserts of the Near East, there are "camel spiders"
which anaesthetize sleeping humans and eat large chunks of their
flesh.
Fact: Most North Americans probably have not heard this legend
(widespread in Arab countries) but it was disseminated to some
degree by Gulf War veterans and also has been repeated by the
uninformed narrator of at least one TV documentary.
"Camel spider" is a common name for solpugids, large
non-spider arachnids found in desert regions. Solpugids
have no venom, not even an anaesthetic, and are strictly predatory
on smaller creatures."
