Dinera, Robineau-Desvoidy, 1830

Zhang, Chun-Tian & Shima, Hiroshi, 2006, A systematic study of the genus Dinera Robineau-Desvoidy from the Palaearctic and Oriental regions (Diptera: Tachinidae), Zootaxa 1243 (1243), pp. 1-60 : 7-10

Key to species of Dinera from the Palaearctic and Oriental regions

1. Abdominal syntergite 1+2 excavated to posterior margin or at least to anterior margin of base of median marginal setae; 2+3, 3+3 or 3+4 dc; costal spine undeveloped ...... 2

­ Abdominal syntergite 1+2 excavated only at base or at most to 2/3 way to posterior margin; 2+3 or 3+3 dc; costal spine developed or undeveloped ............................... 11

2. Parafacial with rather dense fine short hairs on upper 1/2; abdomen entirely black in ground color, with grayish white pruinosity of appearance and brownish reflection on posteromedian portion of each tergite; abdominal syntergite 1+2 with strong median marginal setae in male, without them in female, tergites 3 and 4 with median discal setae in male, without them in female; palpus dark brown or black in both sexes; usually 3+3 dc...................................................................................... D. setifacies sp. nov.

­ Parafacial bare or at most with several short fine hairs on upper portion just below lowest frontal seta; abdomen entirely black or broadly reddish yellow in ground color, abdominal syntergite 1+2 with or without median marginal setae, tergites 3 and 4 with or without median discal setae, if discal setae present, then arranged on posterior portion of each tergite; palpus dark brown or reddish yellow; 2–3+3–4 dc ...................... 3

3. Palpus greatly reduced, less than 1/2 of pedicel; wing yellowish at base and strongly tinged with brown in middle; abdomen broadly reddish yellow, darkened on base of syntergite 1+2, narrow mid­dorsal longitudinal portion, posterior margin of tergite 4 and anterior 1/2–1/3 of 5; large species, more than 16 mm long ................................... ..................................................................................................... D. brevipalpis sp. nov.

­ Palpus normal, at least as long as flagellomere 1; wing hyaline, at most weakly tinged with pale brown along veins; abdomen entirely black in ground color, or reddish on sides; large to medium­sized species ........................................................................... 4

4. 2–3+3 dc, if 3+4, then abdomen entirely black and female lacking median marginal setae on abdominal syntergite 1+2 ............................................................................... 5

­ 3+4 dc, if 3+3, then due to reduction of 2nd postsutural seta, 1st and 2nd setae widely separated and mid tibia with a v seta in both sexes ..................................................... 6

5. Abdomen entirely black in ground color; basicosta reddish yellow; mid tibia without v seta in male; abdominal syntergite 1+2 without median marginal setae in both sexes; usually 2+3 dc; tergite 3 with a large square brown spot, tergite 4 with median discal setae on posterior portion and tergite 3 sometimes with them in male, tergites 3 and 4 sometimes without median discal setae in female, rarely with them on 4; antenna black ................................................................................................... D. angustifrons sp. nov.

­ Abdomen broadly reddish yellow on sides in male, narrowly reddish brown in female; basicosta brown; mid tibia with a v seta in both sexes, sometimes very fine in male; tergites 3 and 4 without median discal setae in both sexes; 3+3 dc; abdominal syntergite 1+2 with median marginal setae in male, without them in female; antennal scape, pedicel and base of flagellomere 1 reddish brown ....................... D. orientalis sp. nov.

6. Abdominal syntergite 1+2 with strong median marginal setae that are as long as or only slightly shorter than abdominal tergite 3; abdomen black or at most reddish on sides, with irregular discal setae at least on tergite 4 ................................................... 7

­ Abdominal syntergite 1+2 without median marginal setae or with short and fine setae that are at most 1/2 as long as tergite 3; abdomen broadly reddish yellow in male, broadly blackish with reddish basal and ventral portion in female, without discal setae on tergites 3 and 4 ......................................................................................................... 9

7. Antenna black, scape and pedicel at most weakly reddish brown; abdomen mainly black in ground color, tergites 3 and 4 each with fine irregular discal setae arranged on median portion in male ................................................................................................ 8

­ Antenna with scape, pedicel and basal 1/2–2/5 of flagellomere 1 reddish yellow; abdomen usually reddish on sides especially in male, discal setae strong and arranged on posterior portion of tergite 4 and sometimes on tergite 3 ................ D. takanoi (Mesnil)

8. Prementum about 1/2 as long as eye height; abdomen with rather thin grayish white pruinosity at most on anterior 1/2 of tergites 3 and 4, with brownish reflection on median and posterior portions, without pruinosity; facial carina high, rather broad on anterior surface .................................................................................. D. similis sp. nov.

­ Prementum longer, about 5/8 eye height; abdomen evenly covered with dense grayish white pruinosity; facial carina rather low and sharp on anterior surface ........................ ............................................................................................................. D. ferina (Fallén)

9. Postpronotal lobe, lateral portion of scutum, posteromedian portion of postsutural scutum, upper portion of anepisternum and scutellum reddish brown; abdomen broadly reddish brown in male and female, black on mid dorsal longitudinal portion, dorsum only with thin whitish pruinosity on anterior margin of tergites 3 and 4 .......... .................................................................................................. D. meridionalis sp. nov.

­ Thorax almost entirely black in ground color, at most apex of scutellum narrowly brownish; abdomen broadly reddish yellow on sides in male, and broadly black in female, with thin whitish pruinosity on almost entire dorsum ................................... 10

10. Antenna entirely pale reddish yellow; palpus pale yellowish; head with whitish pruinosity; lower calypter white, at most only slightly tinged with pale yellow .................. ........................................................................................................ D. miranda (Mesnil)

­ Antenna brown, pedicel and basal portion of flagellomere 1 reddish brown; palpus reddish brown, darkened at base; head with yellowish brown pruinosity; lower calypter pale brown to brown .............................................................. D. chaoi sp. nov.

11. Abdominal syntergite 1+2 without median marginal setae in both sexes; 2–3+3 dc 12

­ Syntergite 1+2 with strong median marginal setae, if median marginal setae absent in female, then 3+3 dc and costal spine undeveloped .................................................... 16

12. Palpus yellow; costal spine well developed; 2+1 katepisternal setae; thorax and abdomen densely and evenly covered with grayish pruinosity, presutural area of scutum with 4 narrow and rather weak longitudinal vittae ..................................................... 13

­ Palpus dark brown to black; costal spine indistinct; 1–2+1 katepisternal setae; thorax and abdomen with dark yellowish gray or brownish pruinosity, presutural scutum with 3 broad vittae or 5 vittae of which 3 inner vittae sometimes fused with each other .. 14

13. Legs reddish yellow, tarsi darkened, hind tibia with a strong apical pv; antenna with scape and pedicel reddish yellow; prementum about 1/2 as long as head height ........... ...................................................................................................... D. grisescens (Fallén)

­ Legs black, hind tibia without apical pv; prementum elongate, slightly longer than head height; antenna dark brown to black ............................. D. longirostris Villeneuve

14. Mid tibia without v seta in male; lower calypter yellowish to pale brown in male, pale yellowish in female ..................................................................................................... 15

­ Mid tibia with a v seta in both sexes; thoracic dorsum dark brownish in male, 2 dark yellowish longitudinal vittae visible, female with dark yellowish gray pruinosity on dorsum, with 3 broad longitudinal vittae; lower calypter dark brown in male, pale brownish in female; abdomen with more thin yellowish brown pruinosity on anterior portion of each tergite, each tergite broadly and triangularly darkened in male, posterior portion transversely black in female .......................................... D. alticola sp. nov.

15. Thoracic dorsum rather densely covered with dark yellowish gray pruinosity, 3 broad longitudinal vittae usually distinct; scutellum brown on base; usually 2+3 dc; abdomen densely covered with yellowish brown pruinosity and triangular black median spot distinct on tergites 3 and 4, the median spot rather elongate and diffusing marginally, continuous from syntergite 1+ 2 to 5 in female ............................. D. maculosa sp. nov.

­ Thoracic dorsum dark brown pruinose, with 5 narrowly black longitudinal vittae, scutullum dark black except yellowish brown marginal region; 3+3 dc; abdominal tergites each with a dark triangular transverse band ................ D. sichuanensis sp. nov.

16. 2+3 dc; frons strongly narrowed upward in male, 1.5–2 as wide as palpus at apical portion; interfrontal area obliterated toward ocellar triangle and forming a narrow line in male, in female subequal in width to parafrontal at middle; abdomen evenly and densely covered with yellowish gray pruinosity ................................... D. xuei sp. nov.

­ 3+3 dc; frons wider in male, at the narrowest point slightly wider than width of flagellomere 1; interfrontal area at least as wide as fronto­orbital plate at middle..... 17

17. Thorax and abdomen with densely yellowish gray pruinosity; thoracic dorsum with 5 narrow longitudinal vittae on presutural area of scutum and 3 on postsutural scutum; parafacial wide, more than 3 times as wide as flagellomere 1 at middle height in lateral view; usually 2+2 ac; vertex about 1/8 of head width in male ....................................... ..................................................................................................... D. carinifrons (Fallén)

­ Thorax and abdomen with grayish white pruinosity, abdominal dorsum dark brownish on median portion and black on lateral and posterior portion on each tergite and thorax with 3 broad longitudinal vittae; parafacial at most 2.5 times as wide as flagellomere 1 at middle; usually 1+2 ac; vertex 1/9–1/11 of head width in male; female sometimes without median marginal setae on syntergite 1+2 ............................ D. fuscata sp. nov.