What is "bistones"

Bistones is the name of a Thracian people who dwelt between Mount Rhodopé and the Aegean Sea, beside Lake Bistonis, near Abdera. From the worship of Dionysus in Thrace, female Bacchanals were sometimes called Bistonides, just as in some Latin poems, Edonis (from another Thracian tribe, the Edoni) refers to female Bacchanals. Pliny mentions one town as belonging to the Bistones: Tirida. According to myth Biston founded the Bistones tribe.