Daddy longlegs or Harvestmen

Opiliones (formerly Phalangida) are an order of arachnids commonly known as harvestmen. As of 2006, over 6,400 species of harvestmen have been discovered worldwide, although the real number of extant species may exceed 10,000. Although they belong to the class of arachnids, harvestmen are not spiders, which are of the order Araneae rather than the order Opiliones. (Wikipedia)