Pachyprotasis rufodorsata, Zhong & Li & Wei, 2021

Zhong, Yihai, Li, Zejian & Wei, Meicai, 2021, Review of the Pachyprotasis flavipes group (Hymenoptera: Tenthredinidae) from China with descriptions of two new species, Zoologia (e 59733) 38, pp. 1-50 : 2-3

Key to species of the Pachyprotasis flavipes group

1. Hind tarsi black, the apical joints sometimes with white or red macula.................................................................... 2

1’. Hind tarsi white or reddish-brown, the apical joints sometimes black...................................................................... 11

2. Mesopleuron and metapleuron reddish-brown............... 3

2’. Mesopleuron and metapleuron black or yellowish-white, without red macula.......................................................... 4

3. Mesoscutum reddish-brown; lower part of mesopleuron with broad white band; antennomere 1 longer than antennomere 2 .................. China (Sichuan, Hubei, Ningxia, Shaanxi)............................................ P. rufodorsata sp. nov .

3’. Mesoscutum black; lower part of mesopleuron without white band; antennomere 1 shorter than antennomere 2. China (Hunan) ................................ P. nigritarsalia sp. nov.

4. Mesepisternum white, lower part sometimes with narrow black band, or mesepisternum black, lower part with broad horizontal white band that is not narrower than 1/4 of mesepisternum ...................................................... 5

4’. Mesepisternum black, anterior part sometimes with white spot, or lower part with narrow horizontal white band that is not broader than 1/4 of mesepisternum ............. 8

5. Mesepisternum black, lower part with broad horizontal white band ....................................................................... 6

5’. Mesepisternum white, lower part with a narrow and short black band. China (Tibet), India, Nepal............................ ................................................. P. citrinipicta Malaise, 1945

6. Hind femur red or black without white, sometimes the extreme base, adjacent to the white trochanters, also a little white ........................................................................ 7

6’. Basal half of hind femur white, apical half reddish-brown; dorsal part of head polished, microsculpture absent or indistinct, punctures sparse. China (Fujian, Hunan, Shaanxi, Zhejiang) ........................ P. wui Wei & Nie, 1998

7. Punctures on mesopleuron deep, distinct; lateral part of median mesoscutal lobe yellowish-white; all of laterotergites yellowish-white. China (Gansu), Japan, Mongolia, Europe, Siberia.................. P. variegata ( Fallén, 1808)

7’. Punctures on mesopleuron shallow, indistinct; apex of median mesoscutal lobe yellowish-white; lateroterga yellowish-white only at extreme edge. China (Tibet, Yunnan), Burma............................... P. corallipes Malaise, 1945

8. Basal half or at least third of hind femur white; mesopleuron black, without white macula..................................... 9

8’. Hind femur reddish-brown, without white macula; lower part of mesopleuron with white spot. China (Gansu) ...... ................................................ P. sanguinipes Malaise, 1931

9. Terga black, without distinct white spot ....................... 10

9’. Central part of each tergum with a large triangular white spot. China (Gansu, Guizhou, Henan, Hunan, Sichuan, Yunnan)................................................. P. zuoae Wei, 2005

10. Basal 1/2 of metafemur striped with black on outer side; base of each serrula distinctly elevated. China (Guizhou, Henan, Hunan, Hubei, Shaanxi).. P. parasubtilis Wei, 1998

10’. Metafemur striped with black along the entire length on outer side; base of each serrula indistinctly elevated. China (Henan, Hubei, Shaanxi, Sichuan)................................ ...................................... P. lineatifemorata Wei & Nie, 1999

11. Mesepisternum yellowish-white, lower part sometimes with narrow black band, or mesepisternum black, lower part with broad horizontal white band that is not narrow- er than 1/4 of mesepisternum........................................ 12

11’. Mesepisternum black, anterior part sometimes with white spot, or lower part with narrow horizontal white band that is not broader than 1/4 of mesepisternum ............ 15

12. Lower part of mesepisternum white, without black; metacoxa and metafemur without black stripes ........... 13

12’. Lower part of mesepisternum with a narrow and short black band; outer side of metacoxa and metafemur with black stripes. China (Yunnan) ........... P. zhengi Wei & Zhong, 2006

13. Basal third of metafemur yellowish-white; upper part of mesopleuron black, lower part yellowish-white; occiput black ............................................................................... 14

13’. Basal two-thirds of metafemur yellowish-white; mesopleuron yellowish-white, without black; occiput yellowish-white. China (Tibet), India........................................... ............................................... P. subtilissima Malaise, 1945

14. Labrum with squarely pointed anterior margin; hind tarsomeres 2–5 yellowish-white; central part of each tergum with a yellowish-white short-triangular spot. China (Sichuan, Tibet) ........................... P. flavipes ( Cameron, 1902)

14’. Labrum with acutely pointed anterior margin; hind tarsus reddish-brown, without yellowish-white; central part of each tergum with a yellowish-brown long-triangular spot. China (Gansu, Henan, Hubei, Shaanxi) ............................ ....................................................... P. acutilabria Wei, 1998

15. Punctures on mesepisternum rough and irregular, surface between punctures opaque ............................................ 16

15’. Punctures on mesepisternum smooth and regular, surface between punctures polished .......................................... 17

16. Clypeus and labrum white, without black; lower part of inner orbit white, upper part black; metacoxa reddish-brown, outer side with a large white spot; hind tarsus white, basal 1/3 of tarsomere 1 and apex of tarsomere 5 black. China (Sichuan, Yunnan)................ P. rufinigripes Wei & Nie, 1998

16’. Clypeus and labrum with black spots; inner orbit white, without black; metacoxa black or reddish-brown, without white spot; hind tarsus reddish-brown. China (Sichuan, Yunnan), Burma, India.................. P. maesta Malaise, 1934

17. Space on dorsal part of head rough, microsculpture indistinct; center of frontal area concave, frontal ridges acute.. 18

17’. Space on dorsal part of head polished, microsculpture absent; center of frontal area not concave, frontal ridges rounded; body length 11.0–12.0 mm; clypeus yellowish-white, without black spot; center of each tergum with a distinct white triangular spot. China (Anhui, Fujian, Guizhou, Hunan) .......... P. xanthotarsalia Wei & Nie, 2003

18. Metacoxa reddish-brown, sometimes with black spot, but never with white stripe .................................................. 19

18’. Metacoxa yellowish-white, ventral side sometimes with black stripe ..................................................................... 20

19. Hind tarsus reddish-brown, basal third of tarsomere 1 and apex of tarsomere 5 black; center of clypeus and labrum reddish-brown. China (Henan, Hunan, Shaanxi, Sichuan, Yunnan)..................................... P. shengi Wei & Nie, 1999

19’. Hind tarsus yellowish-white, basal half of tarsomere 1 black; clypeus and labrum white, without red macula. China (Guizhou, Henan, Shaanxi, Sichuan, Burma-Yunnan frontier); India...................... P. subtilis Malaise, 1945

20. Punctures on mesopleuron shallow and minute, space between punctures polished, microsculpture absent or indistinct; apex of terga 4–6 each with a distinct white triangular spot ................................................................21

20’. Punctures on mesopleuron deep and large, space between punctures rough, microsculpture distinct; terga black, without distinct white spot. China (Anhui, Fujian, Guizhou, Guangdong, Guangxi, Henan, Hubei, Hunan, Shaanxi, Zhejiang, Burma-Yunnan frontier), India........... ............................................... P. subulicornis Malaise, 1945

21. Clypeus and labrum white, without black macula........ 22

21’. Anterior margin and center of clypeus blackish-brown, center of labrum blackish-brown. China (Hunan, Zhejiang)...................... P. longipetiolata Zhong, Li &Wei, 2018

22. Mesepisternum black, without white ............................ 23

22’. Ventral part of mesepisternum white, anterior part sometimes with white spot. China (Anhui, Gansu, Guizhou, Henan, Hunan, Zhejiang) P. henanica Wei & Zhong, 2002

23. Basal tenth of metafemur yellowish-white; punctures on mesepisternum absent, or extremely minute, shallow. China (Henan) ....................................... P. weni Wei, 1998

23’. Basal fourth of metafemur yellowish-white; punctures on mesepisternum moderate. China (Henan) ........................ ..................................................... P. magnilabria Wei, 1998