Diacamma scalpratum valid India. Indomalaya.
Smith, F. 1858a. Catalogue of hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. London: British Museum, 216 pp.   128685

Diacamma scalpratum violaceum obsolete combination Myanmar. Indomalaya.
Forel, A. 1900f. Les Formicides de l'Empire des Indes et de Ceylan. Part VII. Journal of the Bombay Natural History Society 13:303-332.   125101