Another species of Creightonella, differing by the colour of the hair on the tarsi and ventral abdominal segments, &c., has been described by Friese (Zeits. f. Hym. Dipt. 1903, p. 273) as M. sexdentata. Unfortunately this name was used by Robertson in 1895 for an American species, so it will have to be changed. M. mandibulata, Smith, is also perhaps a Creightonella, but this cannot be definitely determined without an examination of the types.
