Borneomyia tigra Brake

Brake, Irina, 2004, Borneomyia, a new genus and two new species of Milichiidae (Diptera, Schizophora), Zootaxa 627, pp. 1-8 : 4-7

Borneomyia tigra Brake , n. sp.

( Fig. 1–4 , 6–8 )

Genus nov 1, sp. 1, in Brake 2000 ( Fig. 1 C, 3A, 6B, 11F­H).

Male. Coloration: Yellow with brown vittae as stated below. Extent of brown coloration varies between darker and paler specimens, resulting in different width of vittae. Setae black except where otherwise stated.

Head: Yellow except for brown arista, dorsolateral base of pedicel, and frontal triangle. Brown vitta from apex of frontal triangle to level of second anteriormost interfrontal setula. Roughly circular brown spot on face ventral to each antenna and brown lower margin of face. Brown vitta on ventral and posterior half of gena but dorsal to most ventral row of genal setulae. Proboscis and palpus yellow, eye yellow. Eye 1.2–1.7x as high as long. Frons 1.2–1.4x as long as broad. Pedicel usually with only one, sometimes with two strong setae, longer than basoflagellomere. Gena about 0.1–0.2x as high as eye. Palpus flat, elongate spatulate, with 1 longer seta at ventral edge and several smaller setulae.

Thorax: Yellow except for narrow brown vittae as follows: medially on mesonotum and extending onto scutellum and there broadening; along dorsocentral track; along intraalar track between transverse suture and posterior end of mesonotum, united with dorsocentral vitta posteriorly; vitta beginning dorsally from postpronotum, extending to presutural seta and to base of wing (ventral to supra­alar seta); on dorsal part of anepisternum beginning just dorsal to anterior spiracle and extending to base of wing; between proepimeron and katepisternal seta. Vittae are about as wide as distance between prescutellar setae. Scutellum with basal scutellar seta very long, 1.5–1.8x as long as apical seta.

Legs: Yellow except for sub­basal dorsal vitta on forecoxa and dorsal base of mid­ and hindcoxa; forefemur with brownish tinge along posterior aspect, short vitta in middle of, and apical spot on anterior aspect; midfemur with brown femoral organ and brown spot anteriorly at middle and tip (some specimens additionally with brown anterior base); hindfemur with brown base (except posteriorly) and apex (except ventrally in some specimens); tibiae with brown basal, middle, and subapical ring (except basal ring on hindtibia missing); tarsi with subapical ring on basitarsomere, apical 0.75 of second tarsomere and completely brown distal three tarsomeres (tarsomeres of midleg slightly paler). Ventroapical comb on hindtibia with yellow setulae and ventral rows on basitarsomere of hindleg with yellow setulae.

Wing: Brownish with brown veins; halter yellow. Distal section of M1 about 3– 4 x as long as penultimate section.

Abdomen: Yellow except for brown posterior margins of tergites and posterior half of sternite 5. Terminalia: Epandrium with 3 long and few shorter setae (fig. 7). Surstylus deeply notched, with several setulae medially and laterally on anterior lobe and row of setulae medially on posterior lobe. Hypandrium quite broad in lateral view, connected to phallapodemic sclerite via membrane. Distiphallus short.

Female. Medial pseudotracheae on labellum much stronger than lateral pseudotracheae, both ending at one short spine at apex of labellum ( Fig. 6 B in Brake 2000). Pseudotracheal teeth on lateral two pseudotracheae as hemicircles, teeth on medial pseudotracheae long and thin, ending in one or sometimes two tips. Tergites 1–7 brown except for medial base of T1 and T2, and anterolateral corners of T2–T5. In some specimens anterior part of T1–T7 yellow and posterior part brown. Tergite 8 yellow. Female tergites with more setulae than male tergites. Sternites 1 to 4 and S8 yellow, posterior margin of S4 brown in some specimens. S5–S7 yellow anteriorly and brown posteriorly. Tip of ovipositor as in figure 6, cercus long. Wing slightly darker anteriorly than in male.

Type material. Holotype male: BRUNEI. Laden Forest Reserve, primary mixed dipterocarp forest, PF 3/3, 11.i.1993, M.J. Sahat, NMW.Z. 1992­012. The holotype is glued on a cardboard triangle, is in good condition, and is deposited in the National Museum and Galleries of Wales, Cardiff (NMWC). Paratypes (4ɗ, 86Ψ): 1 ɗ and 1 Ψ, same collection data as holotype (BMNH). BRUNEI. Laden Forest Reserve, logged mixed dipterocarp forest, LF 1/3, 14.xii.1992, M.J. Sahat, NMW.Z. 1992­012 (1 ɗ, 1 Ψ, NMWC); … LF 1/4, 14.xii.1992 (1 Ψ, NMWC); … LF 1/7, 14.xii.1992 (2 Ψ, BMNH); … LF 2/2, 28.xii.1992 (4 Ψ, NMWC); … LF 2/3, 28.xii.1992 (11 Ψ, NMWC, TAU); … LF 2/ 6, 28.xii.1992 (1 ɗ, 7 Ψ, USNM, NMWC); … LF 3/3, 11.i.1993 (1 Ψ, NMWC); … LF 3/6, 11.i.1993 (2 Ψ, NMWC); … LF 4/5, 25.i.1993 (1 Ψ, NMWC); … LF 4/10, 25.i.1993 (2 Ψ, NMWC); … 25.ii.1993 (1 ɗ, 6 Ψ, NMWC); … primary mixed dipterocarp forest, PF 1/6, 14.xii.1992 (3 Ψ, NMWC); … PF 3/3, 11.i.1993 (1 Ψ, NMWC); … PF 4/6, 25.i.1993 (2 Ψ, NMWC).

MALAYSIA. Sabah: Danum Valley, 5.01'N, 117.47'E, 260 m, lowland, mixed dipterocarp forest, Grid No. W10 51, malaise trap sample No. 11, 6–12.ix.1987, A.H. Kirk­ Spriggs, NMW Sabah (Borneo) Expedition NMW.Z. 1987.094 (1 Ψ, NMWC); … malaise trap sample No. M 19, 24.ix. –12.x.1987 (4 Ψ, in ethanol, NMWC); … malaise trap sample No. M23, 12.–18.x.1987 (3 Ψ, in ethanol, NMWC); … 150 m, Grid No. W0 N3, malaise trap sample No. M15, 16.­24.ix.1987 (1 Ψ, in ethanol, NMWC); … malaise trap sample No. M22, 1.–12.x.1987 (1 Ψ, in ethanol, NMWC); … malaise trap sample No. M24, 12.­ 18.x.1987 (1 Ψ, in ethanol, NMWC); … Bukit Monkobo, 51.48'N, 116.58'E, 900 m, malaise trap sample base­camp, stunted hill forest, malaise trap sample No. 1, 7–13.viii.1987 (3 Ψ, NMWC); … Bukit Monkobo stream, malaise trap sample No. 4, 11–17.viii.1987 (3 Ψ, NMWC); … malaise trap sample No. 7, 17–23.viii.1987 (2 Ψ, NMWC); … Bukit Monkobo, 1930 m, upper montane forest summit, malaise trap sample No. 3, 11– 19.viii.1987 (4 Ψ, NMWC); Sabah: mainline West, 56 km West of Silam, 1200 m, seven year old selectively logged forest, malaise trap sample No. 12, 7.­25.ix.1987, A.H. Kirk­ Spriggs. NMW Sabah (Borneo) Expedition NMW.Z. 1987.094 (3 Ψ, NMWC); … 100 m, malaise trap sample No. 20, 25.ix. –14.x.1987 (3 Ψ, in ethanol, NMWC); … lowland, mixed dipterocarp forest, Grid No. Stream, malaise trap sample No. 17, 23.ix. ­28.ix.1987 (1 Ψ, in ethanol, NMWC); … malaise trap sample No. 21, 28.ix. –14.x.1987, (3 Ψ, in ethanol, NMWC). Sabah: Mt. Kinabalu, Kamborangah, 70,750 feet, 29.v.1929, ex F.M.S. Museum, B.M. 1955­354 (1 Ψ, USNM). INDONESIA. Maluku: Bacan Is., Makian, 1.5 km E of Labuha, forest trail, secondary area, malaise trap sample, 23.–26.ix.1985, NMW Indonesia Expedition 1985 (Project Wallace) NMW.Z 1985.078, A.H. Kirk­Spriggs (1 Ψ, NMWC); E. Kalimantan, Kac. Pujungan, Kayan­Mentarang Nat. Reserve, lowland diptero. forest WWF station, Lalut Birai vicinity of Base Camp Log emergence traps, 2° 52'N, 115° 49'E, 378 m, vi–viii.1993, DC Darling Rosichon U., IIS 930596 (1 Ψ, ROM); Sumatra, Aceh, Gunung Leuser Nat. Pk., Ketambe Res. Sta., primary rainforest, young forest (T3)/mature forest (T4), gap/canopy, 350­400 m, 3° 41'N 97° 39'E, malaise trap head, 1–31.xii.1989, DC Darling, IIS 890014 (3 Ψ, MZB, ROM); ... primary forest, mature forest, Terrace 4, light gap, 400 m, malaise trap w/ pans, 22–30.ix.1989, IIS 890003 (1 Ψ, ROM); ..., closed canopy, 1–30.xi.1989, IIS 890012 (1 Ψ, MZB).

Etymology: I named this species tigra , because the brown vittae reminded me of a tiger. The epithet is to be treated as a noun in apposition.

Comments: One male from Malaysia, Sabah (1 km S. Kundasang, 1530 m, 22.viii.1983, G.F. Hevel & W.E. Steiner, USNM) was not included in the type series, because it is lighter than the other specimens, with the brown vittae being thinner and a yellow scutellum.

Figures

FIGURES 1 – 4. Borneomyia tigra Brake n. sp., male (from Brake 2000). 1: Head, frontal view; 2 – 3: Midfemur with femoral organ, anterodorsal view; 4: Basitarsomere of hindleg, anteroventral view. Abbreviations: fr s – frontal setae, orb s – orbital setae. Scale bar: 0.1 mm.

FIGURES 5 – 8. 5: Borneomyia acanthophora Brake n. sp., tip of ovipositor, lateral view; 6 – 8: B. tigra Brake n. sp.; 6: Tip of ovipositor, lateral view; 7: Male terminalia, ventral view; 8: Wing. Abbreviations: bph – basiphallus, ce – cercus, ep – epandrium, hyp – hypandrium, M – media, phap – phallapodeme, phap scl – phallapodemic sclerite, preg – pregonite, R – radius, S – sternite, sba – subanal plate, sep scl – subepandrial sclerite, spa – supra­anal plate, sur – surstylus, T – tergite. Scale bar: 0.1 mm.