Phasia hemiptera (Hobby, 1931)

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320 : 60-63

Key to species of the Phasia hemiptera species­group

(Females of Phasia godfreyi , Phasia transvaalensis , and Phasia yunnanica are unknown.)

1. Males ............................................................................................................................ 2

­ Females ....................................................................................................................... 22

2. Mesoscutum with a distinct golden pruinose spot, at least on the median postsutural part; tergite V with V­shaped golden pruinosity posterolaterally ................................ 3 Mesoscutum evenly pruinose, or with vitta­like pattern; tergite V without such pruinosity ..................................................................................................................................... 4

3. Lower margin of face strongly projecting, pruinose spot usually limited to postsutural scutum; surstylus straight; distiphallus swollen, not branched ...................................... ....................................................................................... P. aurulans ( Meigen, 1824) ♂

­ Lower margin of face slightly projecting, pruinose spot usually covering most of mesonotum, two broad black vittae across suture; surstylus strongly bent upward; distiphallus branched ............................................................ P. aurigera ( Egger, 1860) ♂

4. 1+1 or 1+2 katepisternal setae ...................................................................................... 5

­ 0+0 or 0+1 katepisternal seta ..................................................................................... 13

5. Abdominal tergites strongly shining, pruinosity absent; syncercus slender, surstylus strongly bent upward (Fig. I­63) ........................ P. takanoi (Draber­Mo ń ko, 1965) ♂

­ Abdominal tergites at least thinly grey pruinose; syncercus short, surstylus not strong bent upward .................................................................................................................. 6

6. Surstylus straight or bent downward posteriorly .......................................................... 7

­ Surstylus strongly bent upward posteriorly ................................................................ 10

7. Abdominal tergites with orange­yellow area on tergites I+II, III and IV .................... 8

­ Abdominal tergites totally black .................................................................................. 9

8. Phallus about 1.5 times as long as hypandrium; syncercus slender, almost as long as surstylus; pregonite well developed ..................... P. zimini (Draber­Mo ń ko, 1965) ♂

­ Phallus over 2 times as long as hypandrium; syncercus much shorter than surstylus; pregonite even apically, reduced ....................... P. transvaalensis Sun , new species ♂

9. Syncercus deeply notched posteriorly; M meeting R 4+5 at acute angle.......................... ..................................................................................... P. grandis ( Coquillett, 1897) ♂

­ Syncercus not or shallowly notched posteriorly; M meeting R 4+5 almost at right angle ........................................................................ P. diversa ( Coquillett, 1897) (in part) ♂

10. Hind tarsi with dense fine golden yellow hairs ventrally ............................................... .................................................................................. P. yunnanica Sun , new species ♂

­ Hind tarsi without such hairs ...................................................................................... 11

11. Distiphallus not branched ............................................... P. kudoi Sun , new species ♂

­ Distiphallus branched ................................................................................................. 12

12. Dorsolateral process of distiphallus with two pointed branches .................................. .. .......................................................................... P. grazynae (Draber­Mo ń ko, 1965) ♂

­ Dorsolateral process of distiphallus not branched posteriorly ....................................... ............................................................................... P. albopunctata (Baranov, 1935) ♂

13. All fronto­orbital setae yellow .......................................... P. piceipes ( Wulp, 1892) ♂

­ Fronto­orbital setae black, or with only a few yellow ................................................14

14. Abdomen with yellow or dark yellow area; M meeting R 4+5 at acute angle .............. 15

­ Abdomen totally black; M meeting R 4+5 almost at right angle. ................................. 17

15. Lower margin of face projecting; pleuron of thorax without dense yellow hairs ........... .................................................................................. P. japanensis Sun , new species ♂

­ Lower margin of face perpendicular; pleuron of thorax usually with dense yellow hairs ..................................................................................................................................... 16

16. Frons wider than ocellar triangle; pregonite needle­like, distiphallus narrow posteriorly; Oriental species ......................................... P. godfreyi (Draber­Mo ń ko, 1964) ♂

­ Frons as wide as ocellar triangle; pregonite wide, distiphallus wide posteriorly; Palaearctic species ............................................................ P. hemiptera ( Fabricius 1794) ♂ 17. Phallus not haired; abdomen always uniformly thinly grey pruinose except syntergite I+II; male terminalia as Fig. I­17 .................... P. diversa ( Coquillett, 1897) ♂ (in part)

­ Phallus haired; tergites and terminalia not as above .................................................. 18

18. Abdominal tergites clearly transversely grey pruinose; fronto­orbital plate yellow pruinose; wing not enlarged ........................................ P. subopaca ( Coquillett, 1897) ♂

­ Abdominal tergites shining, or not pruinose as above; fronto­orbital plate grey or yellow pruinose; wing enlarged or not ............................................................................ 19

19. Syncercus deeply notched posteriorly (semicircular); base of pregonite narrow, with sharp point, longer than postgonite; Palaearctic species .. P. obesa ( Fabricius 1798) ♂

­ Syncercus relatively shallowly notched posteriorly; base of pregonite broad, not longer than postgonite; New World species ................................................................ 20

20. Distiphallus distally expanded into short, broad bilobed sclerite; ventrolateral process with two inverted spines; wing pictured on basal 1/2 only .. P. nigrens ( Wulp, 1892) ♂

­ Distiphallus not strongly expanded at apex; wing varied in colour pattern ............... 21

21. Ventrolateral process of distiphallus straight, not bent; western Nearctic species ......... .............................................................................. P. aeneoventris ( Williston, 1886) ♂

­ Ventrolateral process of distiphallus bent, and hook­like; eastern Nearctic species....... ................................................................................ P. robertsonii ( Townsend, 1891) ♂

22. Sternite VII bent, apex directed ventrally .................................................................. 23

­ Sternite VII straight, or bent but apex directed dorsally ............................................ 26

23. Ovipositor bent, apex slightly or strongly directed dorsally ...................................... 24

­ Ovipositor bent, apex slightly or strongly directed ventrally ......................................... ...................................... P. aurulans ( Meigen, 1824) ♀ / P. kudoi Sun , new species ♀

24. Lateral angles of sternite VII bent downward into triangles posteriorly ........................ .................................................................................. P. japanensis Sun , new species ♀

­ Sternite VII not as above ............................................................................................ 25

25. Legs, at least tibia, yellow or brown; New World species .. P. piceipes ( Wulp, 1892) ♀

­ Legs black; Palaearctic species ............................ P. zimini (Draber­Mo ń ko, 1965) ♀

26. Thorax with dense orange yellow or brown hairs; scutellum yellow or brown ............. .................................................................................. P. hemiptera ( Fabricius, 1794) ♀

­ Thorax with sparse black or yellow hairs; scutellum black ....................................... 27

27. Posterior margin of sternite VII rounded or linear in ventral view(as in Figs.I­17.6,I­40.6) ..................................................................................................................................... 28

­ Posterior margin of sternite VII pointed in ventral view (as in Figs. I­1.6, I­61.6) .. 30

28. Sternite VII short and wide, boat­like .......................... P. diversa ( Coquillett, 1897) ♀

­ Sternite VII slender, not boat­like .............................................................................. 29

29. Apex of sternite VII spoon­like, bent dorsally .... P. takanoi (Draber­Mo ń ko, 1965) ♀

­ Apex of sternite VII abruptly broadened, tubular, straight.. P. nigrens ( Wulp, 1892) ♀

30. Lower margin of face strongly projecting, visible in profile; 1 katepisternal seta .... 31

­ Lower margin of face perpendicular, or slightly projecting; 2 katepisternal setae ... 34

31. Abdomen silvery pruinose, always with black longitudinal vitta; abdomen with black transverse vittae posteriorly(at least tergite III);sternite VII thin, triangular, apex pointed .................................................................................. P. subopaca ( Coquillett, 1897) ♀

­ Abdomen black, shining purple, or grey (or yellowish grey) pruinose; if pruinosity present,blacklongitudinalvittaandtransversevittaabsentorindistinct;SterniteVIItapered ..................................................................................................................................... 32

32. Distribution Palaearctic .................................................. P. obesa ( Fabricius, 1798) ♀

­ Distribution New World ............................................................................................. 33

33. Distribution eastern Nearctic ................................. P. robertsonii ( Townsend, 1891) ♀

­ Distribution western Nearctic and Neotropical ... P. aeneoventris ( Williston, 1886) ♀

34. Sternite VII broad and short, as long as or slightly longer than sternite VI (visible part); abdomen with orange yellow area (especially on syntergite I+II, tergite III) ....... ........................................................................................... P. aurigera ( Egger, 1860) ♀

­ Sternite VII distinctly narrow and long;abdomen black or with indistinct dark yellow area. .................................................................................................................................... 35

35. Ovipositor (segment VIII) much longer than sternite VIII ............................................ ........................................................................... P. grazynae (Draber­Mo ń ko, 1965)?

­ Ovipositor (segment VIII) much shorter than sternite VIII ....................................... 36

36. Gena greyish yellow pruinose; sternite VII bent upward gradually; Nearctic species .. .................................................................................... P. grandis ( Coquillett, 1897) ♀

­ Gena grey pruinose; sternite VII bent upward abruptly; Palaearctic species.................. ............................................................................... P. albopunctata (Baranov, 1935) ♀