A recluse spider is a monster added in SLASH'EM.
A real family of poisonous spiders. Most of them are unremarkable. But the bite of some species can cause a nasty necrotic skin lesion taking months to heal or more rarely being even deadly.
Eight legged creature capable of spinning webs to trap prey.
"You mean you eat flies?" gasped Wilbur.
"Certainly. Flies, bugs, grasshoppers, choice beetles,
moths, butterflies, tasty cockroaches, gnats, midges, daddy
longlegs, centipedes, mosquitoes, crickets - anything that is
careless enough to get caught in my web. I have to live,
"Why, yes, of course," said Wilbur.
[ Charlotte's Web, by E.B. White ]