Philaeus (disambiguation)

Philaeus may refer to:

In Greek mythology:
 * Philaeus (son of Ajax), a son of Ajax and Lysidice
 * Philaeus, a son of Munichus and Lelante

In biology:
 * Philaeus, a spider genus
 * Philaeus chrysops, a species in this genus
 * Philaeus multicolor, a synonym for Paraphidippus aurantius
 * Philaeus farneus, a synonym for Phidippus audax