Key to species of Charops Holmgren from China

1. Mesopleuron granulose-punctate (Fig. 4B); scutellum convex; scape and pedicel black (Fig. 4E); mandible black (Fig. 4E); palpi brown (Fig. 4E); hind leg entirely black (Fig. 3).................................... C. mauroknemus sp. nov.

-. Mesopleuron densely rugose, rugose-reticulate or rugose-striate; scutellum slightly concave to flat; scape and pedicel, mandible, palpi yellowish brown; at least trochantellus of hind leg yellowish brown......................................... 2

2. Malar space 0.4× basal width of mandible; hind femur 7.0× longer than width; thyridium separated from basal margin of tergite by ca 3.0× its length; metasoma predominantly ferruginous; hind femur rusty reddish, dark brown ventrally............................................................................................. C. aeruginosus Vas, 2020

-. Malar space usually more than 0.4× basal width of mandible; hind femur 6.0–6.5× longer than width; thyridium separated from basal margin of tergite by approximately its length (except C. brachypterum 3.0× its length); metasoma predominantly yellowish brown; hind femur yellowish brown or entirely black................................................. 3

3. Propodeal medio-longitudinal carina distinct................................................................ 4

-. Propodeal medio-longitudinal carina obscure or absent....................................................... 5

4. Mesopleuron rugose-striate; tegula pale yellow; fore and mid femora entirely yellow; hind tibia basally, first and second tarsal segments yellow.................................................................. C. striatus (Uchida, 1932)

-. Mesopleuron rugose-reticulate; tegula black; fore femur with a black mark below; mid femur blackish brown except apically; hind tibia, first and second tarsal segments black........................................ C. taiwanus Uchida, 1932

5. Propodeal medio-longitudinal carina faintly indicated; hind femur and tibia yellowish brown; male genitalia short...................................................................................... C. bicolor (Szépligeti,1906)

-. Propodeal medio-longitudinal carina absent; hind femur and tibia black; male genitalia long................................................................................................... C. brachypterus (Cameron, 1897)