Key to species of the genus Cyrtopsis Bey-Bienko, 1962 (male)

1. Apical half of tenth abdominal tergite with a pair of broad posterior processes which widely spaced; outer surface of cercus with a short conical process near base with apex rounded....................................... C. platiprocera sp. nov. Tenth abdominal tergite distinctly extended posteriorly; cercus without process on outer surface near base............... 2

2. Apical area of posterior process of tenth abdominal tergite swollen; cercus elongate, with a semicircular lamellate process on inner surface near base........................................................................ C. scutigera Apical area of posterior process of tenth abdominal tergite not swollen; cercus relatively short, without process on inner surface near base............................................................................................ 3

3. Vertex with a T-shaped black marking........................................................... C. t-sigillata Vertex with indistinct markings.......................................................................... 4

4. Apical area of cercus bifurcated, apex acute; apical half of tenth abdominal tergite distinctly narrow, elongated posteriorly and longitudinally split, the subapical area on ventral surface of which with a pair of falcate processes........... C. furcicerca Apical area of cercus not bifurcated, apex rounded........................................................... 5

5. Tenth abdominal tergite elongate and basal area broad, two-thirds apical area slender, with a pair of digitiform lamellate processes on ventral surface in the middle........................................................... C. robusta Tenth abdominal tergite relatively short, half apical area narrow, distinctly curved ventrally; its apex slightly expanded and compressed.................................................................................. C. bivittata