Pest Fruit Flies of the World
Trypeta lemniscata Enderlein, Euphranta rivulosa Bezzi
Body. Body elongate; a balanced mixture of black and yellow.
Head. Number of frontal bristles two pairs (occasionally), or three pairs (usually). 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. 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 concave; with transverse sulcus; shorter than frons; vertical; without dark marks, or with dark spots in antennal furrows (one specimen has small linear mark on inner margin of antennal groove). Parafacial spot absent. Frons and parafacial without small silvery markings. Fronto-orbital plate setulose. Frontal stripe setulose. Eye round, about as high or slightly higher than long. Antenna considerably shorter than face, or about as long as face. Scape, pedicel, and first flagellomere all relatively short. First flagellomere rounded apically. Arista longer than first flagellomere; plumose, with hairs at least half as long as first flagellomere width (short); hairs both dorsal and ventral. Proboscis short, capitate.
Thorax. Inner scapular bristle present and distinguishable from surrounding vestiture; dark. Outer scapular bristle present and distinguishable from surrounding vestiture; dark. Postpronotal bristle present. Presutural dorsocentral bristle absent. Presutural supra-alar bristle absent. Postsutural supra-alar bristle present. Acrostichal bristle present. Postsutural dorsocentral bristle present; bristles about midway between postsutural supra-alar and post-alar bristles. 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 two. Katepisternal bristles present. Anepisternal bristles dark, brown to black. Long, erect setulae on laterotergite present. Scutal setulae acuminate, mixed dark and pale. Scutellum sparsely setulose. Setulae on scutellum short, decumbent; unicolorous, acuminate. Transverse suture with the lateral branches wide apart. Complete sclerotized postcoxal metathoracic bridge absent or semimembranous. Scutum black with orange to red-brown areas; without a large dark central stripe which broadens basally. Postpronotal lobe entirely pale whitish or yellowish. Posterior half of notopleuron pale whitish or yellowish. Scutum dorsad of notopleuron of the ground color, not whitish or yellowish (indistinct, fulvous). 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 one, or three, or zero (the stripes are not as distinctly yellow as in dacines & the lateral ones are especially obscure). Pale medial postsutural stripe of scutum wedge-shaped, or linear, with posterior part expanded, ovoid or triangular, or linear, bilobed posteriorly. Lateral postsutural stripes of scutum can't determine extent. Scutum without blackish dorsocentral stripe. Area bordering scutoscutellar suture medially without dark brown spot, light colored. Discrete pale horizontal stripe along upper anepisternum present and distinct, extending from postpronotal lobe to wing base, or absent or indistinct. Distinct pale vertical anepisternal stripe absent. Katepisternite with pale yellowish or whitish spot absent or indistinct. Transverse suture with pale transverse stripe extending medially from notopleuron anterior to suture, or covered by extension of postsutural lateral stripe. Katatergite with pale yellowish or whitish spot present and distinct (yellow = ground color; posterior third darker), or absent or indistinct. Anatergite with pale yellowish or whitish spot present and distinct (yellow = ground color), or absent or indistinct. Subscutellum uniformly brown, or uniformly black. Mediotergite uniformly brown, or yellowish to orange-brown medially, with distinct dark spots laterally. Scutum entirely microtrichose, microtrichia evenly distributed, or at most with small presutural, medial bare area. 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 absent. Dominant wing pattern cross-banded. Crossbanded wing patterns Rhagoletis-like, or with bands extensively fused, distorted, or greatly reduced. Wing pattern mostly brownish. Dark longitudinal streaks through basal cells absent. Crossvein r-m covered by a major crossband. Crossvein dm-cu covered by a major crossband which reaches posterior margin of wing. Crossveins r-m and dm-cu not both covered by a single crossband. Cell r2+3 apical to r-m with large hyaline area. Anal band absent, or not reaching nearly to wing margin. Cell r1 and r2+3 without darker spots within the pattern. Intercalary band present, distinct from apical band. Subbasal crossband present (faint), or absent. Subbasal and discal crossbands not joined. Marginal hyaline area in cell r1 present and distinct. Ratio of width of apical band in cell r4+5 to length of r-m 4. Anterior apical crossband contiguous with costa over entire length, without marginal hyaline band or spots apically in cells r1 and r2+3, or partly to entirely separated from costa by marginal hyaline band or spots (ambiguous). Posterior apical crossband present, or absent (ambiguous; & see 242); fused to anterior apical band (posterior & anterior apical crossbands so broadly joined they don't appear forked; apex of cell r5 with only a round hyaline incision). Costal and discal bands not joined on vein R4+5. Discal band transverse, or oblique in anterobasal-posteroapical direction, or absent. Discal and apical crossbands not 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 0.3. Ratio of pterostigmal length to width 3. 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 sparse, over proximal section only; ventral setation present. Distance between crossvein r-m and costa longer than r-m. R-m crossvein on cell dm at or near middle of cell dm. Cell bm narrow, triangular; ratio of length to width 3; ratio of width to cell cup width 1. 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; shorter than vein A1+CuA2; triangular.
Abdomen. Abdomen ovate or parallel sided. Abdominal tergites separate. Abdomen in lateral view flatter, more flexible. Abdominal tergite 1 parallel-sided; without a prominent hump laterally. Pecten of dark bristles on tergite 3 of male absent. Tergal glands on tergite 5 absent. Abdominal tergite 5 normal. 6th tergite of female exposed; longer than 5th. Abdominal setulae acuminate and dark. Abdominal microtomentum uniform. Abdominal tergites 3–5 predominantly yellow to orange brown, or predominantly black. Abdominal tergites without medial dark stripe; not brown with medial T-shaped yellow mark; without isolated dark areas on lateral margins of T3-T5; with dark brown transverse bands which may be interrupted medially.
Female terminalia. Syntergosternite 7 straight; shorter than rest of body, but longer than preabdomen; base without a laterally projecting flap; conical, or flattened. Ratio of syntergosternite 7 to abdominal tergite 5 6.5. 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; with large, coarse serrations. Three sclerotized spermathecae.
Miscellaneous. Male attractant: none known.
Oriental. India, Burma, Thailand, Taiwan, Papua New Guinea, Australia (n. Qld.), Fiji, Tonga, Northern Marianas.
Illustrations. • Habitus female (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’.