(Ethnographic Map, Vilna guberniya), St. Petersburg. Slavs (future Belarusians) are three shades of pink: “Белорусы” (White Russian – originally, those from eastern Muscovy, Polotsk and Novgorod): pink horizontal lines; “Кривичи” (originally, an eastern Slavic tribe, centered in Polotsk); “Чернорусы” (Black Russians – originally, those from Pskov and western Muscovy). The two other ethnic groups are Lithuanians, in yellow, who occupy all the area around “Vilno,” and Tatars, in a few pockets within the Lithuanian area.