Map 12
Colobaea nigroaristata has been found only in Sweden (Norrbotten Co., Gällivare; Västerbotten Co., Sorsele) and Finland (Lapland: Inari). It is most closely related to C. distincta but differs from the latter species in having a yellowish anterior margin of the frons, wholly black postpedicel and arista, and wider gena; the male posterior surstylus is heart shaped and lacks the slender posterior process of C. distincta. Nothing is known about its biology or immature stages.