Dolichocephala bicolor Sinclair & Plant 2017, sp. nov.
Creators: name: Sinclair, Bradley J.
name: Plant, Adrian R.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Empididae
Dolichocephala
Dolichocephala bicolor

description: Dolichocephala bicolor sp. nov.
(Figs 1, 8, 9, 17)
Type material. HOLOTYPE, ♂ labelled: “THAILAND: Loei Province/ Phu Hin Rong Kla Nat. Park/ Huai Man Daeng Noi at trail/ 16°57′N 101°03′E, 1600 m / 14.xii.2002 – 17.i.2003, Malaise [Coll. CMU Team]”; “HOLOTYPE/ Dolichocephala / bicolor / Sinclair & Plant [red label]” (QSBG). PARATYPES: THAILAND. Chiang Mai Province: Doi Inthanon NP, Kew Mae Pan, 18°33.163′N 98°28.8′E, 2200 m, MT, 24–30.viii.2006, Y. Areeluck leg. T233 (1 ♀, QSBG); Kew Mae Pan, 18.55817°N 98.48103°E, 2200 m, MT, 29.v.–1.vii.2014, Srisuka & Plant leg. QSBG-2014-157 (1 ♂, 1 ♀, QSBG). Loei Province: same data as holotype, v.2002 – i.2003 (1 ♂, CNC). Nan Province: Doi Phu Kha NP, Office 5, 19°12.418′N 101°4.809′E, 1326 m, MT, 8–15.ix.2007, Charoen & Nikom leg. T3216 (1 ♂, QSBG).
Recognition. This is a mostly pale yellowish brown species with pleura yellow with a dark upper border, scutum with a faint medial stripe and wing with six white spots.
Description (wing length 1.7–1.9 mm). Male. Head: Slender, tapered ventrally. Clypeus and face with greyish pruinescence, extending dorsally as narrow stripe around ocellar triangle and joining to form “U” on upper occiput. Ocellar triangle with pair of stout upturned setae. Antenna brown.
Thorax: Scutum yellowish brown, dull, with faint brownish medial stripe (Fig. 9). Pleura yellow with dark band along upper margin. Several very minute acrostichals anterior to first dc; 5 dc; 1 pprn; 1 presut spal; 1 upper npl, lower npl very slender, short; 1 pal; 2 sctl, shorter than prescutellar dc. Laterotergite with several brownish setulae.
Legs: Coxae, femora and tibiae yellow, tarsi darkening apically.
Wing (Fig. 8): Narrow; infuscate; single long basal costal seta present; base of R4 slightly arched, joining R5 slightly obliquely; base of cell r4 truncate; R4 nearly straight, with short auxiliary crossvein connecting to R2+3, shorter than length of base of R4; R2+3 long, ending in costa distal to base of R4; irrorations distinct (six spots): two spots in cell r2+3 (proximal section); one spot each in cells r4, m1, m2 and m4. Halter brown.
Abdomen: Sclerites brown, shiny, darker than thorax. Terminalia (Fig. 1): Hypandrium subtriangular, with 2 lateral setae. Phallus robust, broad, wider than hypandrium, nearly straight, well sclerotized; distiphallus with sclerotized, cup-shaped cap, with balloon-like inflated membranous sac beneath cap. Ejaculatory apodeme slender. Epandrium subtriangular, with several long, stout marginal dorsal setae. Clasping cercus elongate along margin of epandrium; apex subtriangular, tapered to rounded apex, outer face with several long setae. Cercal plate with 2 long setae. Lobe of subepandrial sclerite stout, with forked and divergent apex, extended beyond surstylus and epandrium. Surstylus very slender, sharply tapered, slightly arched, without setae.
Female. Similar to male. Cercus long, length about 2X basal width.
Etymology. The species name is in reference to the pale pleura and darker scutum.
Distribution. This species is only known from Doi Inthanon (Thanon Thongchai Range), Phu Hin Rong Kla (Petchabun Range) and Doi Phu Kha (Luang Prabang Range) in northern Thailand (Fig. 17).
description: Published as part of Sinclair, Bradley J. & Plant, Adrian R., 2017, Dolichocephala Macquart of Thailand (Diptera: Empididae: Clinocerinae), pp. 551-568 in Zootaxa 4358 (3) on pages 552-554, DOI: 10.11646/zootaxa.4358.3.9, http://zenodo.org/record/1068858