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Elektrophthiria magnifica gen. n., sp. n., oldest bee fly of the bombyliid subfamily Phthiriinae, is described from the Lowermost Eocene amber of Oise (France). It suggests at least a Late Cretaceous age for this group, coincident with the diversification of the flowering plants. Eurodoliopteryx inexpectatus gen. n., sp. n., oldest representative of the mythicomyiid subfamily Glabellulinae, is probably the sister genus of extant Doliopteryx, distributed in Africa and the Arabian peninsula, under very arid conditions. This discovery suggests a relatively humid forest close to a river with a drier surrounding area for the palaeoenvironment of the Oise amber.