Notas sistemáticas sobre abejas Meliponini del Chaco (Hymenoptera, Apidae)

two species characteristic of the chaco region are treated in this contribution: scaptotrigona jujuyensis (schrottky) and lestrimelitta chacoana n. sp. the identity of trigona jujuyensis schrottky, 1911, is clarified and a neotype is designated. descriptions, illustrations and distributional data are presented for each species.