Chelipoda menglunana Grootaert, Yang & Saigusa, 2000

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 : 268-269

Chelipoda menglunana Grootaert, Yang & Saigusa, 2000

( Fig. 13 )

Material examined. – THAILAND, Loei, Phu Ruea National Park, Huay Taey Ditch , 17°30.042'N 101°20.474'E, 1,233 m, Malaise trap , coll. N. Jaroenchai: 1 male, 19–26 Aug.2006 ( QSBG, T532 ) ; 2 females, 5–12.Aug.2006 ( NMWC, T526 ) : Nern Wibaak Ditch, 17°29.907'N 101°20.483'E, 1,196 m, Malaise trap, 1 female, 12–19 Aug.2006 ( QSBG, T527 ) : Pan Hin Khan Maak Ditch, 17°30.042'N 101°20.474'E, 1,219 m, Malaise and pan traps, 11 males, 1 female, 5–6 Aug.2006, ( NMWC, T517 ) ; 2 males, 3 females, 6–7 Aug.2006 ( QSBG, T518 ) ; 5 males, 4 females, 7–8 Aug.2006 ( QSBG, T519 ) ; 5 males, 8–9 Aug.2006 ( QSBG, T520 ) ; 1 male, 3 females, 9–10 Aug.2006 ( QSBG, T521 ) ; 3 males, 7 females, 10–11 Aug.2006 ( NMWC, T522 ) ; 1 male, 2 females, 11–12 Aug.2006 ( QSBG, T523 ) ; 1 female, 12–19 Aug.2006 ( QSBG, T528 ) ; 3 females, 26 Aug.–2 Sep.2006 ( NMWC, T534 ) .

Diagnosis. – A yellowish species with black head and distinctively a strongly marked dark subterminal band on the wing.

Description. – Male. Body length 2.5 mm. Head black with pale dust. All setae yellow or whitish; ocl and vtl strong, upo and lpo becoming progressively weaker ventrally; patch of pale setae behind mouth conspicuous. Basal antennal segments yellow; poped yellowish basally, darker apically, almost 3× long as wide; stylus black, thickened, 2× long as poped. Mouthparts whitish, proboscis black.

Thorax yellow, scutellum and mediotergite brownish. Setae yellowish; two dc (including one level with npl) upper npl, sa and sct all strong; otherwise only minute hairs posteriorly on scutum, pospronotum and lower notopleural area.

Legs yellow, tarsomeres 4–5 darker, T 1 narrowly dark brown posteriorly. C 1 0.8–0.85× as long as thorax, slightly inflated, 6.1–6.2× as long as wide, widest 0.25 from base. F 1 slightly longer than C 1, distinctly inflated, 3.7× as long as wide, widest 0.3 from base; femoral formula 7(5–8)/17(15– 19)/13(12–15)/8(8–11) +1–2 ( Table 1), spines yellow, denticles black; pv spines usually rather close together basally; basal spine(s) rather weak. Mid and posterior femora and tibiae slender, lacking strong setae.

Abdomen brownish yellow; genitalia ( Fig. 13 ) yellow with only apex of phallus and sheath blackish yellow and extreme apex of subepandrial process dark.

Epan and Hypan fused, with lateral lobes completely fused posteroapically but slightly separated posteroventrally, with scattered short setae. Cercus fused with Epan+Hypan, consisting of two roughly triangular parts connected by a narrow intermediate part along dorsum of Epan+Hypan; posterior part narrowly triangular with rather erect short setulae dorsally; anterior part free apically and bearing 2-3 stout black setae apically. Subepandrial process, erect, narrow with apical hook. Phallus strongly reflexed forward, rather broad but abruptly narrowed distally and terminating just anterior of anterior lobe of cercus; phallic sheath also broad and continuing forward beyond apex of phallus for a considerable distance.

Wing veins yellowish basally, darker distally; membrane faintly brownish yellow, a strong black subterminal band commencing at apex of cell dm leaving apex of wing clear. Squamae with pale fringes. Halter whitish yellow.

Female. Antenna with poped darker than in male.

Femoral formula (female) 5(5–6)/19(15–21)/17(14– 22)/5(4–6) +1–2, pv spines usually more evenly spaced basally. Cercus moderately long, yellowish

Remarks. – Described originally from Yunnan, China ( Grootaert et al., 2000), C. menglunana is here reported from Loei Province in north eastern Thailand. Adults were collected for a short period of the wet season in August at around 1,200 m.

Figures

Figs. 12–13. Male genitalia of Chelipoda species in lateral view: 12. C. nakladam new species; 13. C. menglunana Grootaert, Yang & Saigusa. Abbreviations: lcer, lower lobe of cercus; subep, subepandrial process; ucer, upper lobe of cercus.