Pest Fruit Flies of the World

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L.E. Carroll, I.M. White, A. Freidberg, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson

Bactrocera decipiens (Drew)

Dacus decipiens Drew

Body. Body a balanced mixture of black and yellow.

Head. Number of frontal bristles three pairs. Number of orbital bristles one pair. Anterior orbital bristle of male normal, unmodified. Posterior orbital bristles reclinate; acuminate. Ocellar bristles absent or minute, like setulae. Postocellar bristles present (minute), or absent. With both inner and outer vertical bristles. Outer vertical, postvertical and postocellar bristles all acuminate. Postocular bristles acuminate; normal. Genal bristle present. Head higher than long. Male and female head width the same. Frontofacial angle about equal to a right angle and angular. Face shorter than frons; vertical; with dark spots in antennal furrows (medium sized, fuscous to black). Parafacial spot absent. Frons and parafacial without small silvery markings. Fronto-orbital plate setulose. Frontal stripe setulose. Eye elongate, considerably higher than long. Antenna considerably longer than face. Scape, pedicel, and first flagellomere scape and pedicel short, first flagellomere elongate. First flagellomere as long as face; rounded apically. Arista longer than first flagellomere; bare or with hairs distinctly shorter than greatest aristal width. Proboscis short, capitate.

Thorax. Inner scapular bristle present and distinguishable from surrounding vestiture; dark (brown). Outer scapular bristle present and distinguishable from surrounding vestiture; dark. Postpronotal bristle present (weak), or absent. Presutural dorsocentral bristle absent. Presutural supra-alar bristle absent. Postsutural supra-alar bristle present. Acrostichal bristle absent. Postsutural dorsocentral bristle absent. Intra-alar bristle present, well developed, similar to postalar bristle. Intrapostalar bristles absent. Number of scutellar bristles two pairs. Apical scutellar bristles as long as basals or longer. Anterior notopleural bristle present. Posterior notopleural bristle(s) acuminate. Number of outstanding anepisternal bristles one. Katepisternal bristles absent. Anepisternal bristles dark, brown to black (?; ~IMW). Long, erect setulae on laterotergite absent. Scutal setulae acuminate and pale. Scutellum densely setulose. Setulae on scutellum short, decumbent; unicolorous, acuminate. Transverse suture with the lateral branches wide apart. Complete sclerotized postcoxal metathoracic bridge present. Scutum red-brown, or black with orange to red-brown areas; without a large dark central stripe which broadens basally. Postpronotal lobe entirely pale whitish or yellowish; concolorous with lateral postsutural stripe. Posterior half of notopleuron pale whitish or yellowish. Scutum dorsad of notopleuron of the ground color, not whitish or yellowish. Dark lyre-like pattern on scutum absent. Discrete shiny black spots on scutum absent. Median longitudinal black stripe on scutum absent. Number of pale whitish to yellow postsutural stripes three. Pale medial postsutural stripe of scutum lenticular, or tear-drop shaped. Lateral postsutural stripes of scutum extending to intra-alar bristles or beyond. Scutum with blackish dorsocentral stripe. Area bordering scutoscutellar suture medially with dark brown spot. Discrete pale horizontal stripe along upper anepisternum absent or indistinct. Distinct pale vertical anepisternal stripe extending halfway between posterior half of notopleuron and anterior notopleural bristle. Katepisternite with pale yellowish or whitish spot present and distinct. Transverse suture covered by extension of postsutural lateral stripe. Katatergite with pale yellowish or whitish spot present and distinct. Anatergite with pale yellowish or whitish spot present and distinct. Subscutellum yellowish to orange-brown medially, with distinct dark spots laterally. Mediotergite yellowish to orange-brown medially, with distinct dark spots laterally. Scutum microtrichia in discrete pattern due to density differences. Dorsum of scutellum flat or slightly convex, not swollen. Scutellum normal; without a dark and pale pattern (at most a narrow dark basal line); with no isolated dark spots; without black mark; without mark.

Legs. Femora slender. Fore femur with regular bristles; without ventral spines; with 1 to 3 posterodorsal and 1 posteroventral rows of bristles only. Mid femur and hind femur without spine-like bristles. Middle leg of male without feathering. Femora all entirely of one color; dark mark on fore femur 0% of length of femur; dark mark on middle femur 0% of length of femur; dark mark on hind femur 0% of length of femur.

Wings. Wing partly bare. Cell bc microtrichia absent. Cell c microtrichia present in apical area. Cell dm bare on less than basal one-third. Dense microtrichia at end of vein A1+CuA2 in male present (poorly developed). Dominant wing pattern cross-banded (bands faint except on r-m and dm-cu), or costal-banded. Crossbanded wing patterns Anastrepha-like, or with bands extensively fused, distorted, or greatly reduced. Wing pattern mostly yellowish, or mostly brownish. Dark longitudinal streaks through basal cells absent. Costal band complete from wing base to beyond R4+5 (faint in C1 and C2). Apex of costal band not distinctly expanded. Costal band reaching R4+5; all one color. Crossvein r-m covered by a major crossband (faint). Crossvein dm-cu covered by a major crossband which reaches posterior margin of wing (faint). Crossveins r-m and dm-cu not both covered by a single crossband. Cell r2+3 apical to r-m entirely infuscated. Anal band present, reaching nearly to wing margin along cell cup extension. Cell r1 and r2+3 without darker spots within the pattern. Intercalary band absent. Subbasal crossband absent. Marginal hyaline area in cell r1 absent or indistinct. Ratio of width of apical band in cell r4+5 to length of r-m 0.6–0.8. Anterior apical crossband contiguous with costa over entire length, without marginal hyaline band or spots apically in cells r1 and r2+3. Anterior apical band or costal band not extended to vein M. Posterior apical crossband present (faint); fused to subapical band. Costal and discal bands joined on vein R4+5. Discal band transverse, or oblique in anterobasal-posteroapical direction, or absent. Discal and apical crossbands directly joined. Discal and subapical crossbands joined along posterior wing margin. Discal and subapical bands not connected along vein R4+5. Subapical and anterior apical crossbands joined. Outstanding costal spine(s) at subcostal break absent. Ratio of length of costal section 3 to costal section 4 0.8. Ratio of pterostigmal length to width 6. Vein R1 dorsal setation without bare section opposite end of vein Sc. Vein Rs dorsal setation non-setulose. Vein R2+3 generally straight. Anteriorly-directed accessory vein emerging from R2+3 absent. Vein R4+5 dorsal setation dense over at least proximal section; ventral setation present. Distance between crossvein r-m and costa shorter than r-m. R-m crossvein on cell dm at or near distal third of cell dm. Cell bm broad, parallel-sided; ratio of length to width 2.5; ratio of width to cell cup width 2. Vein M distally straight. Cell dm widens apically gradually from base. Posterodistal corner of cell dm approximately a right angle. Cell cup extension or lobe present, vein CuA2 abruptly bent; longer than vein A1+CuA2; with parallel margins.

Abdomen. Abdomen ovate or parallel sided. Abdominal tergites separate. Abdomen in lateral view arched, dome-like, rather rigid. Abdominal tergite 1 broader at apex than at base; without a prominent hump laterally. Pecten of dark bristles on tergite 3 of male present. Tergal glands on tergite 5 present. Abdominal tergite 5 normal. 6th tergite of female normally concealed; shorter than 5th. Abdominal setulae acuminate and pale. Abdominal microtomentum uniform, or absent. Posterior margin of sternite 5 of male with shallow posterior concavity. Abdominal tergites 3–5 predominantly yellow to orange brown. Abdominal tergites with medial dark stripe on T5 only (faint brown); not brown with medial T-shaped yellow mark; without isolated dark areas on lateral margins of T3-T5; without dark brown transverse bands.

Male terminalia. Posterior lobe of surstylus long.

Female terminalia. Syntergosternite 7 straight; shorter than preabdomen; flattened. Ratio of syntergosternite 7 to abdominal tergite 5 0.75. Dorsobasal scales of eversible membrane about as large as other scales. Aculeus tip pointed, with preapical shoulder; fused to main part of aculeus, not movable; not serrate, or with large, coarse serrations. Two sclerotized spermathecae. Spermathecae tight-set coils.

Miscellaneous. Male attractant: none known.

Australasian-Oceanian. New Britain.

Dacinae. Dacini.

Illustrations. • Habitus male (dorsal), wing.


Cite this publication as: ‘L.E. Carroll, I.M. White, A. Freidberg, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson. 2002 onwards. Pest fruit flies of the world. Version: 8th December 2006. http://delta-intkey.com’.

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