Bengalia weii Rognes, 2009, sp. nov.
Creators: name: Rognes, Knut
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Bengalia
Bengalia weii

description: 13. Bengalia weii sp. nov.   
Figs. 162–172, 186, 198, 210.  
Holotype male, China (Yunnan province: Xishuangbanna tropical rain forest, Menglun) (CDPCAG), here designated. For details see Type material below.  
 Etymology. The species-group name “weii” is a proper noun in the genitive case, derived from the surname of the collector Dr. Wei Lianmeng, CDPCAG.   
 Diagnosis. Male. Length: 11mm (n=1). Frons at vertex / head width ratio: 0.338 –0.342 (mean 0.340, n=2). Fronto-orbital plate without proclinate orbital setae. Lunula bare. Anepimeron only with yellow setulae, no black setulae at all. Fore tibia with a group of 7–8 short ventral spine-like setae in proximal half of which 1–2 are longer than the others; the longest spine-like seta shorter than diameter of tibia and situated about in the middle of the group; distally with slight v and pv fringe, longest setae about as long as tibial diameter (Fig. 186). Mid tibia with a v and pv fringe in distal 2/5, longest setae in fringe 1.5–2.0x diameter of tibia (Fig. 198). Hind tibia with a delicate av, v, and pv fringe in distal half (Fig. 210).   
The ST5 flap is very characteristic, with lateral edges converging slowly distally, a V-shaped depression present in distal edge (Fig. 168).  
Cerci slightly curved in profile view (Fig. 167). Surstylus almost bare below, a few pale scattered setulae present close to apex. Process of bacilliform sclerite with a strong base and short tip.  
Distiphallus with rather low dorsolateral wings and broad antlers; latter curving backwards and with several small tines at tip (Figs. 162, 163, 165). Basal tooth strong. In dorsal view upper lip strongly convex with a weak central sclerotisation; in lateral view projecting far beyond base of antlers (Fig. 165). Lateral finger small, not projecting beyond lateral edge of external hypophallic lobe in ventral view (Figs. 162, 163). Above the base of the lateral finger, the anterior edge of the vertical sclerotised sheet has a right-angled toothed projection (Fig. 169). Internal hypophallic lobes converging in their distal part. External hypophallic lobe short, folded distally, presenting a forwardly directed transverse wall. Ventral finger proceeds downwards, inwards and forwards, in lateral view projecting well beyond lower edge of midventral wall; its front edge is slightly denticulate (Fig. 169).  
 Female. Length: 11mm (n=1). Frons at vertex / head width ratio: 41/120 = 0.342 (n=1). ST2, ST3 and ST4 with a pair of widely set marginals, on ST4 one of the pair is absent.   
 Description. Measurements, see Diagnosis above.   
 Male. Head. Yellow ground colour, except for frontal vitta which is light brown and fronto-orbital plate which is greyish brown. Frontal vitta with black ground setulae in anterior two-thirds, in holotype lacking along the posterior half of the frontal row of setae. 5–6 frontal setae on each side, one reclinate seta in front of the well developed outer and inner verticals. No proclinate orbital setae. Fronto-orbital plate narrow. Frontoorbital plate, parafacial and area above vibrissae with black setulae, weak on the parafacial. A shifting greyish spot at the junction of the parafacial and the fronto-orbital plate and outside of the two foremost frontal setae. 1 pair of weak postocellars of about the same size; the pair is situated on the uppermost part of the occiput a little behind an imaginary line connecting the inner verticals. Lunula bare. Scape and pedicel reddish brown, first flagellomere dark, except proximal to level of insertion of arista, about 5x longer than wide. Tip of first flagellomere not reaching level of vibrissa. Arista long plumose. Anterior margin of clypeus reddish and not projecting beyond lower facial margin. Palpus yellow with a bundle of very short setae at tip, 2–4 long setae below in distal half, and a row of 3–5 very long setae on a sclerite at its base.   
 Thorax. Brownish yellow dorsally, with pale brownish dusting; in some lights with much paler lateral areas, these encompassing lateral edge of scutellum, lateral area of dorsum carrying the ia, sa, prst and ph setae and the humeral callus. Darker mid-dorsal part with narrow dark vittae just inside of the dc rows of setae. Ground setulae of scutum black, except on anterior surface of the humeral callus where they are yellow. 0+1 acr (just in front of scutellum); 1+4 dc (postsutural dc becoming stronger backwards); 0+1 ia, 1 prst; 1 ph; 2 h; 1 strong setae (dc ?) present on each side very far forward on scutum just inside the anteromedial corner of the humeral callus; 3 scutellar marginals, no discals. 2 npl (close together). Pleura yellow with irregularly darkened parts and covered with yellowish dusting. Proepisternal depression bare. Proepisternal (anterior) and 1 proepimeral (posterior) setae. A few black setulae above the proepimeral seta. Anterior spiracle yellow. Anepisternum with 5–6 strong marginals, covered with black ground setulae in hind and upper part. Long pale setae behind marginal row of strong setae. Anepimeron with yellow ground vestiture only, no black setulae. Lesser ampulla blackish in anterior half with whitish dusting. Katepisternum with yellow ground vestiture except in the upper part between the 1+1 kepst setae where some small black setulae may be present. In extreme lower end of the katepisternum strong setae present in front of mid coxa. Meron with about 6–8 meral setae. No coxopleural streak. Katatergite bare. Anatergite with only pale ground vestiture, no black setulae below lower calypter. Metakatepisternum with pale setulae. Metasternal area with pale and black setae. Postalar wall pale setose. Prosternum pale setose.   
 Wing. Tegula, basicosta and subcostal sclerite yellow; wing veins all yellow; costa hairy below all the way to junction with R 4+5. Lower calypter with inner margin converging with long axis of fly, more than twice as long as upper. Both calypteres with white fringe hairs, except the inner half of the upper calypter where they are brownish. Halter yellow.   
 Legs. Tarsi yellow, coxae and trochanters yellow. Fore tibia with 3 ad, 1 pv; ad, d, and pv preapicals in increasing size; slight v and pv fringe, longest fringe setae about as long as tibial diameter; tibia yellow. In proximal third is a group of 7–8 short spine-like setae of which 1–2 are longer than the others. The longest spine-like seta is shorter than diameter of tibia and situated about in the middle of the group of spine-like setae. Fore femur yellow with pv setae of different size: 8–9 distal ones strong, situated in distal half; proximal pv setae weak and thin; d row of 6 weak setae, ad row of 7 weak setae. Mid tibia yellow with 1 ad, 2 p; v and pv fringe in distal 2/5, longest setae in fringe 1.5–2.0x diameter of tibia. Mid femur yellow with some darkening on a side; 2 strong a at middle, 2 a preapicals; 2 p preapicals; row of pv setae delicate and weak; pv ctenidium with 8 short flattened spine-like setae in distal 2/5. Hind tibia yellow with 1 av at distal sixth, 2 ad of which the strongest at middle; fringe of long thin av, v, and pv setae in distal half; ad and d preapicals. Hind femur yellow with some darkening on a side; 4–5 widely spaced ad setae; dense vestiture of thin long setulae on av, v and pv side, these setulae about 3/4 of femoral diameter; rows of long thin weak av and pv setae about as long as femoral diameter. Hind coxa with pale ground setulae on posterior surface.   
 Abdomen. Tergites brownish yellow; dusted white in shifting pattern; with narrow black hind margins about 1/5 to 1/6 of tergite length, at middle marginal bands drawn out into pointed triangles pointing forward. Hind margin of basal excavation of T1+2 very far from hind margin. T1+2 with a bundle of 2–5 strong lateral medial and lateral marginals; no lateral discals on T4. T5 with 6 strong marginal setae and 1 pair of discal setae, latter slight more distant than the mid marginals of T4. ST1–3 yellow. ST4 yellow but darkened in hind part. ST5 darkened at base and laterally, area close to flap and flap yellow. Ground vestiture yellow. ST2 with a pair of long median marginals. ST3 with a pair of shorter median marginals plus weaker marginals on each side. ST4 with a pair of median marginals. ST5 flap shaped as in Fig. 168. Epandrium dark blackish brown dulled by thin layer of dust.   
 Male genitalia. See under Diagnosis, above.   
 Female. Similar to male, except as follows. Legs: no fringes on any legs. Mid tibia with a v seta. Hind tibia with 2 smaller av setae above the strong distal av. Abdomen: T1–5 as in male, but T3 without lateral discals. ST1–5 (those visible) yellow. ST2, ST3 and ST4 with a pair of widely set marginals, on ST4 one of the pair is absent. ST1 and ST2 with yellow ground vestiture. ST2 with some black setulae in extreme posterolateral corners. ST3–5 with black ground vestiture laterally.   
 Biology. Captured in tropical rain forest.   
 Distribution. China (Yunnan).   
 [Chinese name for Bengalia varicolor] / Bengalia varicolor / (Fabricius, 1805) ♂ ” [male symbol in red]; (3) My red holotype label (weii n. sp.). Dissected by K. R. Abdominal T1–5, right mid leg and right hind leg glued to card on pin, genitalia in glycerol in vial on pin. Paratypes. 1 male labelled: (1) “Center for Disease Prevention and Control, Anshun City, Guizhou, China / Xishuangbanna 700m / Wei Lianmeng et al. leg. / 25 June 1993 ” [In Chinese]; (2) “C083 … [Chinese name for Bengalia varicolor] / Bengalia varicolor / (Fabricius, 1805) ♂ ” [male symbol in red]; (3) My red paratype label (weii n. sp.). Dissected by Wei Lianmeng; genital capsule and some sternites removed, genitalia not present; drawings of genitalia received in digital form 16 January 2009. 1 female labelled: (1) “Xishuangbanna, Menglun 540m / 25. VI. 1993 / Wei Lianmeng leg.” [In Chinese]; (2) “C083 … [Chinese name for Bengalia varicolor] / Bengalia varicolor / (Fabricius, 1805) ♀ ” [female symbol in red]; (3) My red paratype label (weii n. sp.).
description: Published as part of Rognes, Knut, 2009, Revision of the Oriental species of the Bengalia peuhi speciesgroup (Diptera, Calliphoridae), pp. 1-76 in Zootaxa 2251 (1) on pages 61-66, DOI: 10.11646/zootaxa.2251.1.1, http://zenodo.org/record/10093353