Talk to Oglethorpe and after a minute the spider takes off down the hill. Once at the bottom it becomes aggro (46 ^). Kill the spider.
If you do not follow the spider quick enough, he will despawn. You must wait for him to respawn, and go through the dialog again. If you kill it before accepting the quest it respawns as a non agro version in under a minute; talk with Oglethorpe again and go through the dialoge to respawn.Respawn may have been triggered by hailing Oglethorpe again. Chase after it until it stops and switches to an attackable KoS mob. If you were late chasing after it, look for it between the two drake hills on either side of the bottom of the ramp.