There's a type of spider that eats rolypolies by the gazillions. Only problem is that this spider looks really creepy when it's a "pregnant" female (female full of eggs). It's called a Woodlice Hunter (Dysdera crocata). I have tons of this spider throughout my yard because of the amount of mulch I use for my yard (my entire yard is mulched, so I have lots of wood-loving bugs & non-bugs, and rolypolys are non-bugs.. they're actually a type of crustacean if I remember correctly). If you're freaked out by spiders, do NOT click this link.
http://www.spiderjoe.com/image...
Creepy looking spiders, but keeps the rolypolys in check. Now if I could just figure out what eats centipedes...
