Bengalia peuhi, Villeneuve, 1914

Rognes, Knut, 2009, Revision of the Oriental species of the Bengalia peuhi speciesgroup (Diptera, Calliphoridae), Zootaxa 2251 (1), pp. 1-76 : 15-17

Key to males of the Oriental Bengalia peuhi species-group

1 Fronto-orbital plate with 2–3 pairs of proclinate orbital setae, the hindmost pair more or less lateroclinate; distal half of distiphallus enormously prolonged and supported on underside by diverging sclerotised lamellae; distiphallus without dorsolateral wings; inner hypophallic lobes strongly converging midventrally; external hypophallic lobes ending in long sharply pointed ventral fingers; distiphallus with short pointed antlers, with a pair of long delicate denticulate lateral fingers projecting downwards from a shield-like apical dorsal surface, and with a transversely oval upper lip ( Figs. 54, 56, 57, 61, 62 ) ........................................................................... 4. Bengalia fani Feng & Wei

- Fronto-orbital plate without proclinate orbital setae (very rare exceptions); distiphallus with or without dorsolateral wings; distal half of distiphallus not prolonged ........................................................................................................... 2

2 Anepimeron with yellow setulae only, no black setulae at all ..................................................................................... 3

- At least some black setulae (as few as 2–3, usually many more) on anepimeron ....................................................... 5

3 ST5 flap with lateral edges converging gradually distally, a shallow V-shaped emargination present in distal edge ( Fig. 168 ). Fore tibia with a few strong ventral spine-like setae in proximal half, shorter than tibial diameter ( Fig. 186 ) ..................................................................................................................................... 13. Bengalia weii sp. nov.......................................................................................................................................... 5. Bengalia inermis Malloch

- Fore tibia with at least two strong ventral spine-like setae in basal half, much stronger than the other small spine-like setae ( Fig. 183 ) ................................................................................................................ 11. Bengalia unicolor Séguy

5 Upper lip of aedeagus shaped as a long narrow strongly sclerotised pointed and partly upturned process ( Figs. 98– 100 ). ST5 flap almost square with rounded distal corners, hind margin usually with a broad depression of varying depth in middle ( Fig. 105 ). Fore tibia with several strong ventral spine-like setae a little above middle, the strongest a little longer than tibial diameter ( Fig. 179 ). Anepimeron with few (up to 10–12) black setulae. Narrow black bands on yellow abdominal tergites. Hind tibial fringe weak.....................................................7. Bengalia lyneborgi James

- Upper lip of aedeagus broad or non-projecting, never a narrow pointed tooth-like structure. ST5 flap different ..... 6

6 ST5 flap with an even or almost even, hind border, at most a small nick in the middle part ( Figs. 90 , 155 ), never a deep excavation. Fore tibia in basal half with row of small ventral spine-like setae of which the distal ones are slightly longer than the others ( Figs. 178, 184, 185 ). Distiphallus with a strongly projecting upper lip, its anterior edge convex in dorsal view and strongly concave on the underside as seen from in front ......................................... 7

- ST5 flap with a more or less deep excavation in posterior border ( Figs. 12 , 15, 19, 23 , 35, 37, 38, 40, 42 , 50 , 116 , 127 , 136 ). Fore tibia varied ......................................................................................................................................... 8

7 ST5 flap as in Fig. 90 , concave laterally, proximal half usually a little narrower but sometimes about as broad as distal half, distal margin almost straight or (rarely) slightly sinuous with very broad and very shallow bay at middle. Never a nick in the middle. Mid tibia with weak fringe distally, longest fringe setae on posteroventral side 1.5–2.0x tibial diameter ( Fig. 191 ). Hind tibia strongly fringed on anteroventral side ( Fig. 203 ). Distiphallus with both lateral and ventral fingers strong; anterior end of midventral wall level with anterior end of dorsolateral wings in profile view ( Figs. 84, 86, 87, 91, 92 )..........................................................................................6. Bengalia latro de Meijere

- ST5 flap as in Fig. 155 , concave laterally, much narrower in basal than distal half, posterolateral corners usually rather acute, distal margin slightly convex and usually (but not always) with a small pronounced notch at middle ( Fig. 155 ). No posteroventral fringe distally on mid tibia, setae in this region shorter than diameter of mid tibia ( Fig. 197 ). Hind tibia with a weak av fringe ( Fig. 209 ). Distiphallus with lateral and ventral fingers small; anterior end of midventral wall level with middle of dorsolateral wings in profile view ( Figs. 149, 150, 152, 156, 157 ), resembling a strongly receding lower jaw..................................................................................... 12. Bengalia varicolor (Fabricius)

8 Hind tibia with a row of 3–5 long thin setae on anteroventral surface of apical half in addition to the strong av seta, but without typical fringe ( Figs. 205, 206 ). Mid tibia also without distal fringe, all setae shorter than tibial diameter ( Figs. 193, 194 ). Fore tibia varied................................................................................................................................ 9

- Fringe on hind tibia usually pronounced, with numerous setae beside the av row, also invading the v and pv side ( Figs. 199, 200, 207 ). Mid tibia varied. Fore tibia proximally with a ventral row of very small equally sized spinelike setae ( Figs. 173–175, 182 ) .................................................................................................................................. 10

9 Fore tibia without spine-like setae proximally on ventral side ( Fig. 180 ). ST5 flap with slightly convex lateral edges ( Fig. 116 ). Strikingly narrow frons. Anepimeron almost entirely with black setulae, many reaching katepisternum, a few yellow setulae in lower hind part only. Aedeagus with no projecting upper lip ( Fig. 109 ). [Aedeagus very similar to that of Bengalia taksina ] ............................................ 8. Bengalia pseudovaricolor Kurahashi & Tumrasvin, 1979

- Fore tibia with two rather long spine-like setae a little shorter than tibial diameter proximally on ventral side ( Fig. 181 ). ST5 flap with concave lateral edges ( Fig. 127 ). Anepimeron mostly clothed with yellow setulae, a small bundle of black setulae (3–15) on upper part just below lesser ampulla. Aedeagus with projecting upper lip ( Figs. 119, 122 ) .................................................................................................................. 9. Bengalia surcoufi Senior-White

10 Anepimeron with numerous black setulae almost all over posterior half, some small black setulae reaching katepisternum. Strongly developed fringes on all tibiae ( Figs. 173, 174 , 187 , 199 ). ST5 flap with distal emargination of varying depth ( Figs. 12 , 35, 40 ). Distiphallus distally in dorsal view with a broad projecting transverse lip ( Figs. 6 , 26 ) ......................................................................................................................................................................... 11

- Anepimeron with a small bundle of black setulae in upper third or half, no black setulae reaching katepisternum. Fringes on tibiae usually less strongly developed. ST5 flap elongate with deep distal excavation and diverging, slightly convex sides ( Figs. 50 , 136 ). Distiphallus without projecting upper lip ( Figs. 47 , 130 ).............................. 12

11 ST5 flap rounded with a rounded distal emargination; distally on each side a small but conspicuous concavity ( Figs. 12 , 15, 19, 23 ) which is somewhat depressed below the remaining surface of the flap, like a broad gutter. Upper lip of distiphallus transverse in dorsal view ( Fig. 6 ). Outer edge of upper lip slightly inside of base of antlers as seen in anterior view ( Fig. 14 ). Upper part of anterior edge of vertical sclerotised sheet serrated and right-angled in profile

- ST5 flap more elongate with rounded sides and with a variably sized distal emargination ( Figs. 35, 37, 38, 40, 42 ); no concavity distally on each side and no edge area depressed below general flap surface on distal half of the external side, latter evenly rounded. Upper lip of distiphallus very slightly convex in dorsal view ( Fig. 26 ). Outer edge of upper lip outside of base of antlers as seen in anterior view ( Fig. 34 ). Anterior edge of vertical sclerotised sheet a straight serrated line in profile view ( Fig. 33 ). Edge connecting lip and base of antler straight in lateral view ( Fig. 28 ) ................................................................................................................ 2. Bengalia emarginatoides sp. nov.

12 Aedeagus with parastomal sclerites curving forwards in profile view (concavity towards distal end), and with a forward projection at middle ( Fig. 132 ). Frons narrow. Mid tibia without prolonged posteroventral setae in distal part ( Fig. 195 ). Fringe on hind tibia not very dense, covering slightly more than distal half of anteroventral surface, hardly invading ventral and posteroventral surface, the posteroventral fringe setae hardly longer than tibial diameter ( Fig. 207 )........................................................................................................................10. Bengalia taksina (Lehrer)

- Aedeagus with parastomal sclerites curving downwards in profile view (concavity towards ventral side) ( Fig. 47 ). Mid tibia with somewhat prolonged posteroventral setae in distal part, twice the diameter of tibia ( Fig. 188 ). Fringe on hind tibia rather dense ( Fig. 200 ), situated on distal two-thirds or more of anteroventral surface, prominent also on ventral and posteroventral surface, the posteroventral fringe setae twice the tibial diameter or more............................................................................................................................................................3. Bengalia emdeniella (Lehrer)

Figures

FIGURES 54–63. Bengalia fani Feng & Wei, male (from holotype in CDPCAG). 54. Distiphallus, dorsal view. 55. Pre- and postgonites. 56. Distiphallus, ventral view. 57. Distiphallus, left lateral view. 58. Cerci and surstyli, dorsal view. 59.

FIGURES 162–171. Bengalia weii sp. nov., male (from holotype in CDPCAG). 162. Distiphallus, dorsal view. 163. Distiphallus, ventral view. 164. Pre- and postgonites, left lateral view. 165. Distiphallus, left lateral view. 166. Cerci and surstyli, dorsal view. 167. Cerci and surstyli, left lateral view. 168. ST5 flap. 169. Lateral finger and ventral finger, enlarged. 170. Distiphallus from in front. 171. Label. Scale = 0.25mm (Figures 162–165). Abbreviations: l.f. = lateral finger; v.f. = ventral finger.

FIGURES 173–186. Bengalia peuhi species-group, male fore tibia. 173. B. emarginata Malloch (holotype). 174. B. emarginatoides sp. nov. (BMNH, paratype, “Kandy, Ceylon …”). 175. B. emdeniella (Lehrer) (holotype). 176. B. fani Feng & Wei (holotype). 177. B. inermis Malloch (SDEI, “Los Banos”). 178. B. latro de Meijere (ZMAN, paralectotype ... 0118.11). 179. B. lyneborgi James (ZMUC, paratype “… Mantalingajan …”). 180. B. pseudovaricolor Kurahashi & Tumrasvin (holotype). 181. B. surcoufi Senior-White (holotype). 182. B. taksina (Lehrer) (holotype of Afridigalia taksina Lehrer). 183. B. unicolor Séguy (holotype). 184. B. varicolor (Fabricius) (holotype of Musca varicolor Fabricius). 185. B. varicolor (Fabricius) (holotype of Bengalia bezzii Senior-White). 186. B. weii sp. nov. (paratype).

FIGURES 98–108. Bengalia lyneborgi James, male (98–103, 106–107 from paratype in ZMUC “… Uring Uring 25 August 1961 …”; 104, 108 from paratype in ZMUC “… Uring Uring 20 August 1961 …”; 105 from non-paratype in ZMUC “… Uring Uring 17 August 1961 …”). 98. Distiphallus, dorsal view. 99. Distiphallus, ventral view. 100. Distiphallus, left lateral view. 101. Three original labels. 102. Cerci and surstyli, dorsal view. 103. Cerci and surstyli, left lateral view. 104. Tip of distiphallus, from in front. 105. ST5 flap. 106. Pre- and postgonites. 107. Lateral finger. 108.

FIGURES 83–92. Bengalia latro de Meijere, male (83–91 from lectotype in ZMAN; 92 from paralectotype in RMNH). 83. Cerci and surstyli, anteroventral view. 84. Distiphallus, dorsal view. 85. Pre- and postgonites. 86. Distiphallus,

FIGURES 149–158. Bengalia varicolor (Fabricius), male (from holotype of Musca varicolor Fabricius in ZMUC). 149. Distiphallus, dorsal view. 150. Distiphallus, ventral view. 151. Pre- and postgonites. 152. Distiphallus, left lateral view.

FIGURES 6–14. Bengalia emarginata Malloch, male (from specimen labelled “Koshun, Formosa, Sauter IX 08” in SDEI). 6. Distiphallus, dorsal view. 7. Distiphallus, ventral view. 8. Anterior edge of vertical sclerotised sheet, showing angular shape and serrations. 9. Distiphallus, left lateral view. 10. Cerci and surstyli, dorsal view. 11. Cerci and surstyli,

FIGURES 15–25. Bengalia emarginata Malloch, male (15–18 from holotype in BMNH; 19, 20 from specimen labelled “Los Banos / P.I. Baker” in MSNM; 21, 22 from specimen labelled “Koshun, Formosa, Sauter IX. 08” in SDEI; 23–25 from holotype of Afridigalia bezziella Lehrer in BMNH). 15. ST5 flap. 16. Left antler. 17. Right antler. 18. Labels. 19. ST5 flap. 20. Labels (three, original on top). 21. Distiphallus, oblique view from right, showing dorsal opening. 22. Original labels (two). 23. ST5 flap. 24. Original labels (two). 25. Labels (three). Abbreviation: d.o. = dorsal opening.

FIGURES 35–43. Bengalia emarginatoides sp. nov., male (35, 36 from paratype in NHRM; 37 from holotype in SDEI; 38, 39 from paratype in SDEI; 40, 41 from dissected paratype in MNHN; 42, 43 from paratype in BMNH, Green leg.). 35. ST5 flap (microscope image). 36. Original label. 37. ST5 flap (microscope image). 38. ST5 flap (stereomicroscope image of dried specimen). 39. Original label. 40. ST5 flap (microscope image). 41. Original labels (two). 42. ST5 flap (stereomicroscope image of Canada balsam mount). 43. Original locality labels (two), plus Senior-White’s hand-written label in pencil.

FIGURES 44–52. Bengalia emdeniella (Lehrer), male (from holotype of Afridigalia emdeniella Lehrer in BMNH). 44. Distiphallus, dorsal view. 45. Distiphallus, ventral view. 46. Pre- and postgonites of right side. 47. Distiphallus, left lateral view (upper arrow points to anterior edge of upper lip, lower arrow points to ventral finger). 48. Cerci and surstyli, dorsal view. 49. Cerci and surstyli, left lateral view. 50. ST5 flap. 51. Distiphallus from in front (slightly oblique view).

FIGURES 109–118. Bengalia pseudovaricolor Kurahashi & Tumrasvin, male (holotype in NMNS). 109. Distiphallus, dorsal view. 110. Distiphallus, ventral view. 111. Distiphallus, left lateral view (left antler broken at tip). 112. Distiphallus, unbroken right antler. 113. Four original labels. 114. Cerci and surstyli, dorsal view. 115. Cerci and surstyli, left lateral view. 116. ST5 flap. 117. Tip of distiphallus from in front. 118. Pre- and postgonites, left side. Scale = 0.25mm (Figures 109, 110, 111). Abbreviations: d.o. = dorsal opening; l.f. = lateral finger; pst.scl. = parastomal sclerite; v.f. =

FIGURES 119–129. Bengalia surcoufi Senior-White, male (119–122, 124, 127–129 from “Kalimpong” specimen; 123, 125, 126 from “Kasanli” specimen; both in MSNM). 119. Distiphallus, dorsal view. 120. Distiphallus, ventral view. 121. Pre- and postgonites. 122. Distiphallus, left lateral view. 123. Original label. 124. Original label. 125. Cerci and surstyli, dorsal view. 126. Cerci and surstyli, left lateral view. 127. ST5 flap. 128. Tip of distiphallus from in front. 129. Vertical

FIGURES 130–138. Bengalia taksina (Lehrer), male (130–136 from holotype of Afridigalia taksina Lehrer in BMNH; 137, 138 from dissected “VIET NAM …” specimen in BPBM). 130. Distiphallus, dorsal view. 131. Distiphallus, ventral view. 132. Distiphallus, left lateral view. 133. Labels on holotype. 134. Cerci and surstyli, dorsal view. 135. Cerci and surstyli, left lateral view. 136. ST5 flap. 137. Tip of distiphallus, from in front. 138. Pre- and postgonites. Scale =

FIGURES 187–198. Bengalia peuhi species-group, male mid tibia. 187. B. emarginata Malloch (holotype). 188. B. emdeniella (Lehrer) (holotype). 189. B. fani Feng & Wei (holotype). 190. B. inermis Malloch (SDEI, “Los Banos”). 191. B. latro de Meijere (USNM, paralectotype with red syntype label). 192. B. lyneborgi James (ZMUC, paratype “… Mantalingajan …”). 193. B. pseudovaricolor Kurahashi & Tumrasvin (holotype). 194. B. surcoufi Senior-White (BMNH, paratype 1, 14.vi.1920). 195. B. taksina (Lehrer) (BPBM, undissected). 196. B. unicolor Séguy (holotype). 197. B. varicolor (Fabricius) (CDPCAG, Guizhou, Longgong, Anshun City). 198. B. weii sp. nov. (paratype).

FIGURES 199–210. Bengalia peuhi species-group, male hind tibia. 199. B. emarginata Malloch (holotype). 200. B. emdeniella (Lehrer) (holotype). 201. B. fani Feng & Wei (holotype). 202. B. inermis Malloch (SDEI, “Los Banos”). 203. B. latro de Meijere (USNM, paralectotype with red syntype label). 204. B. lyneborgi James (ZMUC, paratype “… Mantalingajan …”). 205. B. pseudovaricolor Kurahashi & Tumrasvin (holotype). 206. B. surcoufi Senior-White (holotype). 207. B. taksina (Lehrer) (holotype of Afridigalia taksina Lehrer). 208. B. unicolor Séguy (holotype). 209. B. varicolor (Fabricius) (CDPCAG, Guizhou, Longgong, Anshun City). 210. B. weii sp. nov. (paratype).

FIGURES 26–34. Bengalia emarginatoides sp. nov., male (from holotype in SDEI). 26. Distiphallus, dorsal view. 27. Distiphallus, ventral view. 28. Distiphallus, left lateral view. 29. Original label. 30. Cerci and surstyli, dorsal view. 31. Cerci and surstyli, left lateral view. 32. Pre- and postgonites. 33. Anterior edge of vertical sclerotised sheet, showing linear shape and serrations. 34. Distiphallus from in front. Scale = 0.25mm (Figures 26, 27, 28, 32).