Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Arachnid Rider

( Races of Faerun, p. 161)

[Racial]

You are trained in the art of employing spiders as steeds. Regions: Drow elf, gray dwarf.

Prerequisite

Benefit

You receive a +2 bonus on all Handle Animal and Ride (any arachnid) checks. You may use the Handle Animal skill to affect monstrous spiders of Large size or smaller.