Key to species of the genus Cyrtosia known from Iran

1. Frons yellow, at most with small black spot medially......................................................... 2

-. Frons mostly black or with broad black stripe medially....................................................... 3

2. Scutellum mostly yellow............................................................. C. meridionalis Rondani

-. Scutellum completely matte black................................................ C. persica Gharali & Evenhuis

3. Halter knob with large brown spot dorsally............................ C. bispermatheca Gharali & Evenhuis, sp. nov.

-. Halter knob completely yellow.......................................................................... 4

4. Frons almost all black, at most ventral margin narrowly yellow.................................................5

-. Frons yellow with black line medially................................. C. baccadomus Gharali & Evenhuis, sp. nov.

5. Scutellum completely black, gray dusted....................................................... C. pusilla Loew

-. Scutellum black with yellow along posterior margin.......................... C. zieglerii Gharali & Evenhuis, sp. nov.