You can always change up the beads and use seed beads for the legs.
For More DIY Spider Jewelry, See Below:
DIY Cheapest Spider Necklace and Bobby Pins Ever Tutorial from Delia Creates here. The necklace and bobby pins are made out of spider rings commonly found for $1 for 50.
DIY Glitter Spiders from Wobisobi here. Use for jewelry, accessories, anything Halloween.