Diadegma curvicaudis is a wasp first described by Szepligeti in 1916. No subspecies are listed.Szepligeti, G. (1916) Ichneumoniden aus der Sammlung des ungarischen National-Museums. II., Annales Musei Nationalis Hungarici. 14:225-380.Taxapad Ichneumonoidea. Yu D.S.K., 2009-05-04

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