Dielis is a New World genus of the family Scoliidae, also known as the scoliid wasps, formerly treated as a subgenus within Campsomeris.

[1] Dielis are medium sized wasps that exhibit strong sexual dimorphism.

The females are black with broad yellow or orange bands on the abdomen, often on the first 3 or 4 tergites.

[2] The forewing of Dielis species includes two recurrent wing veins and two submarginal cells as typical of the genera of Campsomerini, apart from Colpa.

[3] Species of this genus occur from Canada south to Chile and Argentina.