Chelipoda guangxiensis Yang & Yang, 1986

Plant, Adrian R., 2009, Diversity Of Chelipoda Macquart, 1823 (Diptera: Empididae: Hemerodromiinae) In Northern Thailand With Discussion Of A Biodiversity ‘ Hot Spot’ At Doi Inthanon, Raffles Bulletin of Zoology 57 (2), pp. 255-277 : 259-261

Chelipoda guangxiensis Yang & Yang, 1986

( Fig. 3 )

Material examined. – THAILAND, Loei, Phu Kradueng National Park , Malaise and pan traps, coll. Thanongsak Srisa-ad, savannah in pine forest, 16°53.092'N 101°47.413'E, 1,257 m, 1 male, 29–30 Oct.2006 ( QSBG, T1214 ) ; 1 male, 2–3 Jan.2007 ( QSBG, T1218 ) ; 1 female, 9–16 Jan.2007 ( QSBG, T1226 ) . Loei, Phu Ruea National Park, pan trap, coll. P. Tumtip: Ma Kraow Ditch , 17°29.652'N 101°21.020'E, 1,167 m, 1 female, 10–11 Nov.2006 ( QSBG, T1113 ) : Pan Hin Khan Maak Ditch , 17°30.042'N 101°20.474'E, 1,219 m, pan traps, coll. P. Tumtip, 1 male, 5–6 Feb.2007 ( NMWC, T1698 ) ; 1 female, 7–8 Feb.2007 ( NMWC, T1700 ) ; 1 male, 9–10 Feb.2007 ( NMWC, T1702 ) . Nakhon Nayok, Khao Yai National Park , nature trail in secondary moist evergreen forest, 14°24.515'N 101°22.432'E, 750 m, Malaise trap, coll. P. Sandao, 1 female, 26 Aug.–2 Sep.2006 ( NMWC, T409 ) .

Diagnosis. – Thorax dark dorsally, yellowish on pleura. Head black. C 1 without distinct anterobasal setae. Antennae with basal segments dark reddish yellow, not contrasting strongly with poped.

Description. – Male. Body length 2.5 mm. Head black with paler dusting. Stronger setae black including ocl, vtl and upper upo; other upo and lpo fine and paler; a patch of fine pile behind mouth. Basal antennal segments dark reddish brown; poped greyish black, 2× long as wide; stylus brown to yellow (depending on light), 2.5–3.0× long as poped. Mouthparts yellowish with greyish labellum and darker proboscis.

Thorax with pleura yellow including most of laterotergite; scutum, scutellum and mediotergite dark yellowish black. All setae black; anterior dc and upper npl strong; mid dc (in line with npl) and posterior dc (near posterior margin of scutum) very fine; lower npl very fine, hardly stronger than scattering of fine setulae behind postpronotum; sa small.

Legs dark yellow, tarsomeres 4–5 darker, F 1 rather brownish at extreme apex. C 1 0.90–0.95× as long as thorax; rather stout, 6× as long as wide, narrowing slightly apically; no strong anterobasal seta. F 1 slightly longer than C 1, distinctly inflated, 4× as long as wide, widest 0.3 from base; femoral formula 5(5–5)/23(22–25)/16.5(15–17)/4(3–4) +1 ( Table 1), spines yellow, denticles black; basal spine distinct, more or less contiguous with series of av spines.T 1 0.72–0.75× long as F 1.

Abdomen brown dorsally, paler ventrally; tergites 6 and 7 with posterior margin concave; tergite 8 considerably reduced, distinctly narrowed dorsally. Subterminal tergites and sternites lacking strong setae. Epan and Hypan ( Fig. 3 ) fused, brown, elongate smoothly trapezoid in lateral view, left and right lamellae narrowly separated by unpigmented membrane. Cercus fused with Epan, brown basally with single long broad yellowish lobe bearing series of fine strong setae dorsally. Subepandrial process yellowish, apically blackish, rather broad with apex narrowed and strongly upcurved. Phallus yellow, somewhat sinuous apically.

Wing membrane faintly brown, veins brown. Squamae with black fringes. Halter greyish brown.

Female. Head and thorax similar to male. Legs similar to male, femoral formula approx. 5/23/16/4 +1. Cercus elongated, yellow.

Remarks. – Previously known only from Guangxi, China ( Yang & Yang, 1986), this species is now reported from the sandstone mesa formations in Thailand’s Loei province at Phu Kradueng and Phu Ruea and from Khao Yai in Nakhon Nayok. Adults were caught at elevations from 750–1,257 m between late October and early February and again in August.

Figures

Figs. 1–6. Male genitalia of Chelipoda species in lateral view: 1. C. chaiamnata new species; 2. C. flavida Brunetti; 3. C. guangxiensis Yang & Yang; 4. C. inthawichayanona new species: 5–6 C. hubeiensis Yang & Yang; 5. typical form; 6. variant (outline only).