Key to the species of Ctenosciara in China (males) 1. Wing vein CuA2 with setae ........................................................................................................................................... 2 - Wing vein CuA2 bare ............................................................................................................... C. japonica Sutou & Ito 2. R1, R5, M1, and M2 with both ventral and dorsal setae (Fig. 1 D) ................................................. C. mutisetosa sp. nov. - R1, M1, and M2 without ventral setae (Fig. 2 D, 3D, 4D)............................................................................................... 3 3. Tegmen as long as broad, quadrangular (Fig. 4 E). R5 with dorsal and ventral setae on the apical half (Fig. 4 D) ......... ..................................................................................................................................................... C. xijingensis sp. nov. - Tegmen longer than broad, apically rounded (Fig. 2 E, 3E). R5 with dorsal and ventral setae only on the apical third or along its entire length (Fig. 2 D, 3D)......................................................................................................................... 4 4. R5 with dorsal and ventral setae only on the apical third (Fig. 2 D). Gonostylus with four subapical megasetae (Fig. 2 F) ......................................................................................................................................... C. pseudoinsolita sp. nov. - R5 with dorsal and ventral setae along its entire length (Fig. 3 D). Gonostylus with 5–8 subapical megasetae (Fig. 3 F) ...................................................................................................................................................................................... 5 5. Apex of gonostylus attenuated (Fig. 3 E) ................................................................................... C. rufulenta (Edwards) - Apex of gonostylus not attenuated, almost equally wide along entire length ........................ C. hyalipennis (Meigen)

Published as part of Wu, Hong, Zhang, Su-Jiong & Huang, Junhao, 2010, The genus Ctenosciara Tuomikoski in China, with descriptions of three new species (Diptera, Sciaridae), pp. 42-50 in Zootaxa 2560 on page 43, DOI: 10.5281/zenodo.197013