Xanthesma flavicauda, or Xanthesma (Xenohesma) flavicauda, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1965 by American entomologist Charles Duncan Michener.
The species occurs in western New South Wales. The type locality is 27 km north of Broken Hill.
The adults are flying mellivores.