Identification key to adult males of Zavrelia

1. Anal point densely covered with strong spines …...................................................... Z. pentatoma

– Anal point bare, with microtrichia or short spinules only …........................................................ 2

2. Setiger of superior volsella with conspicuous constriction in apical 1/3 …................................. 3

– Setiger of superior volsella without conspicuous constriction in apical 1/3 …................................. 5

3. Setiger of superior volsella with pointed apex .. ...................................................… Z. clinovolsella

– Setiger of superior volsella with somewhat rectangular apex …................................................... 4

4. Anal point with only few microtrichia in between crests; distinct microtrichia-free areas on anal tergite around base of anal point …... Z. sinica – Anal point with numerous microtrichia in between crests; microtrichia present all around base of anal point .......................… Z. pseudopentatoma

5. Anal point with small spinules in between crests .........................................................................… 6

– Anal point bare, or with microtrichia in between crests at most ...................................................… 7

6. AR 1.23; wing length about 1.50 mm; LR 1 about 1.45; laterosternite with one seta; anal point with small spinules scattered between entire length of anal crests ....................................… Z. tusimatijea

– AR 0.91–1.08; wing length 0.88–1.04 mm; LR 1 about 2.09; laterosternite without seta; anal point with small spinules scattered between anal crests at anal point base only .....................… Z. bragremia

7. Anal point bare ............................................… 8

– Anal point with microtrichia in between crests. 9

8. AR 1.00–1.18; LR 1 1.36–1.46; superior volsella with pointed apex ................................… Z. elenae

– AR 0.45; LR 1 1.96; superior volsella with rounded apex …...................................... Z. simantoneoa

9. Wing length c. 1.40 mm; AR c. 0.75.. Z. hudsoni

– Wing length c. 1.00 mm; AR c. 0.90... Z. aristata