Key to species of Tumidiclava (females) from Xinjiang, China

1 Antenna with club 2-segmented, fore wing disc with only 2 rows of setae arranged as a “V” (Figs 2, 3)... T. buerjinica sp. nov.

- Antenna with club 3-segmented (Figs 7, 11, 15), fore wing disc sparsely or densely setae, the setae irregularly arranged (Figs 9, 12, 16)..............................................................................................2

2 Fore wing disc sparsely setae (Fig. 12)..................................................... T. tamariska sp. nov.

- Fore wing disc more densely setae (Figs 9, 16).............................................................. 3

3 Club about as long as scape................................................................ T. minoripenis Lin

- Club notably longer than scape...........................................................................4

4 Midlobe of mesoscutum with 2 setae.......................................................... T. simplicis Lin

- Midlobe of mesoscutum with 4 setae......................................................................5

5 Fore wing with venation extending nearly half wing length (Fig. 9)............................. T. subcaudata Nowicki

- Fore wing with venation extending about one-third fore wing length (Fig. 16)......................... T. tenuipenis Lin