Species of this group have not been recorded from Tanzania. Moreover, I cannot recognise X. laeta; thus: or Tanzanian species of the group 4f (i.e. X. cyanipennis Breuning, 1957 or X. orientalis Breuning, 1961) actually belong to the group 4e (X. asperata/laeta) or it is a new species. In all cases, very interesting to study.