Syrphidae, Latreille, 1802
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publication ID |
https://doi.org/10.5852/ejt.2018.448 |
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publication LSID |
lsid:zoobank.org:pub:413AE92E-862A-4879-B72F-1C0DCF1F7240 |
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DOI |
http://doi.org/10.5281/zenodo.3815661 |
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persistent identifier |
http://treatment.plazi.org/id/FA02BC3C-C97C-FFA2-97F7-FB974B2304B4 |
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treatment provided by |
Valdenar |
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scientific name |
Syrphidae |
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Key to the species of Syrphidae in French Polynesia
1. Postpronotum bare, head posteriorly strongly concave and closely appressed to thorax so that postpronotum is partly or entirely hidden ( Fig. 2View Fig B–C); male abdomen with five unmodified pregenital segments; tergum 5 visible in dorsal view ( Fig. 2View Fig A–D).............................................5
– Postpronotum pilose, head posteriorly less strongly concave so that postpronotum is clearly exposed ( Fig. 5View Fig A–B); male abdomen with four unmodified pregenital segments; tergum 5 usually not visible in dorsal view ( Fig. 5View Fig D–E, G).......................................................................................2
2. Vein R4+5 strongly sinuate ( Fig. 5AView Fig); metafemur with basoventral patch of black setulae ........ ................................................................................................. Palpada vinetorum ( Fabricius, 1798)
– Vein R4+5 straight or nearly so ( Fig. 5C, EView Fig); metafemur without basoventral patch of black setulae...............................................................................................................................................3
3. Arista plumose ( Fig. 4EView Fig); face with medial and two lateral tubercles ( Fig. 4EView Fig); metafemur not enlarged, without ctenidium; entire body metallic green or purple ( Fig. 4BView Fig) ................................... .......................................................................................................... Ornidia obesa ( Fabricius, 1775)
– Arista bare ( Fig. 4FView Fig); face carinate ( Fig. 4FView Fig); metafemur greatly enlarged, with a ctenidium on posteroventral half ( Fig. 5View Fig B–E); body coloration mainly black with pale markings ( Fig. 5View Fig B–E, G–H)..................................................................................................................................................4
4. Spurious vein well sclerotized, as distinct as the neighboring R and M veins ( Fig. 5C, GView Fig); ventral surface of metatibia modified, with anteroventral carina forming a prominent lamina in males, less evident in females. Male: terga 2 and 3 with a broad yellow fascia not divided medially ( Fig. 5GView Fig). Female: tergum 4 with a distinct yellow fascia on posterior margin ( Fig. 5DView Fig) .......... ............................................................................................... Syritta aenigmatopatria Hardy, 1964
– Spurious vein not sclerotized, appears as a shadow formed by microtrichia ( Fig. 5B, EView Fig); metatibia without lamina; terga 2 and 3 with a medial black vitta forming two lateral yellow maculae ( Fig. 5EView Fig) ......................................................................... Syritta oceanica Macquart, 1855
5. Face and scutellum entirely black in ground color ( Fig. 4A, DView Fig); metasternum greatly reduced, with deep anterior incision on each side (as in Fig. 9CView Fig) ......... Melanostoma polynesiotes sp. nov.
– Face and/or scutellum partially pale in color, usually yellow in ground color ( Figs 3F, HView Fig, 6EView Fig); metasternum entire, not reduced.....................................................................................................6
6. Face partly black, usually yellow with a medial black vitta ( Fig. 3B, D, FView Fig); metasternum with at least some pile; abdomen without margin ( Figs 2View Fig A–B, 3A).......................................8
– Face entirely yellow ( Fig. 3HView Fig); metasternum bare; abdomen distinctly marginated on terga 2–5 ( Figs 2DView Fig, 3GView Fig, 5FView Fig)...............................................................................................................................7
7. Katepisternum without a dorsal yellow macula but densely pollinose ( Fig. 5FView Fig); scutellum usually with black and pale pile; male metatrochanter without any process or projection ( Fig. 6BView Fig) .......... ..................................................................................... Simosyrphus grandicornis Macquart, 1842 *
– Katepisternum with a dorsal yellow macula ( Fig. 3GView Fig); scutellum with pale pile only; male metatrochanter with a ventral spine-like process or calcar ( Fig. 6AView Fig) .............................................. ............................................................................................... Ischiodon scutellaris ( Fabricius, 1805)
8. Scutum and scutellum entirely black ( Figs 2BView Fig, 6CView Fig); abdominal terga 3 and 4 black with two small yellow maculae each, close to the lateral margin ( Figs 2BView Fig, 6DView Fig) ..... Allograpta jacqi sp. nov.
– Scutum black with lateral yellow vitta ( Figs 2AView Fig, 3AView Fig) and scutellum yellow with black medial macula ( Fig. 2A, CView Fig); abdominal terga 3 and 4 black with a yellow fascia each ( Figs 2A, CView Fig, 3AView Fig)...9
9. Wing entirely microtrichose except cell R bare anterior to spurious vein basally; costal cell bare basally, less than 1/5 .................................................... Allograpta amphotera ( Bezzi, 1928)
– Wing partly bare basomedially, cell BM bare on basal ¼–½ or more, cell R bare anterior to bifurcation; costal cell bare on basal ¼ ..................... Allograpta nigripilosa ( Hull, 1944)
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