Flower flies (Diptera, Syrphidae) of French Polynesia, with the description of two new species Author Ramage, Thibault 8DE31F66-13BF-4516-A205-60F2EA39E3DD 9 Quartier de la Glacière, 29900 Concarneau, France. Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, CNRS (UMR 5558), Université Lyon 1, 69622 Villeurbanne, France. Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institut für Biodiversität der Tiere, Adenauerallee 160, D- 53113 Bonn, Germany. thibault.ramage@hotmail.fr Author Charlat, Sylvain A9AE69C2-039D-47FD-9DD2-B34C4363CB71 sylvain.charlat@univ-lyon1.fr Author Mengual, Ximo A509310D-B567-4830-B8A4-BCB139BB8768 x.mengual@leibniz-zfmk.de text European Journal of Taxonomy 2018 2018-07-04 448 1 37 journal article 22322 10.5852/ejt.2018.448 0ba05318-1eec-44bc-8017-b6e2789b4811 3814059 413AE92E-862A-4879-B72F-1C0DCF1F7240 Simosyrphus grandicornis ( Macquart, 1842 ) Figs 5F, I , 6B Syrphus grandicornis Macquart, 1842: 96 ( holotype : ♂, MNHN; type locality: Australia , Sydney, Port Jackson). Syrphus sydneyensis Macquart, 1846: 263 . Syrphus pusilla Macquart, 1847: 77 . Syrphus melanurus Bigot, 1884: 97 . Syrphus obesus Hutton, 1901: 41 . Syrphus vitiensis Bezzi, 1928: 71 . Ischiodon scutellaris Bryan, 1934: 412 . Metasyrphus fasciatus Shiraki, 1963: 186 . Syrphus australiensis Van der Goot, 1964: 220 . Syrphus huttoni Van der Goot, 1964: 220 . Differential diagnosis Simosyrphus grandicornis has often been confused with species of Ischiodon , especially I. scutellaris , as they are sympatric and the males of both species have large genitalia. The morphological characteristics to distinguish S. grandicornis are the broadly rounded basoflagellomere (subacute apically in I. scutellaris ), black katepisternum ( Fig. 5F ) (with a dorsal yellow marking in I. scutellaris ; Fig. 3G ), simple male metatrochanter ( Fig. 6B ) (with a spine-like process in I. scutellaris , Fig. 6A ) and black metafemur, yellow on the apical fourth (mostly yellow, black only subapically in I. scutellaris ). Fig. 6. A . Ischiodon scutellaris ( Fabricius, 1805 ) , ♂ (ZFMK-DIP-00019713), metacoxa and metatrochanter. Arrow indicates the ventral spine-like process. B . Simosyrphus grandicornis ( Macquart, 1842 ) , ♂ (ZFMK-DIP-00019736), metacoxa and metatrochanter. C–E . Allograpta jacqui Mengual & Ramage sp. nov. , holotype ♂ (ZFMK-DIP-00026906). C. Lateral view. D. Dorsal view. E. Frontal view. F–G . Melanostoma polynesiotes Mengual & Ramage sp. nov. , paratype, ♂ (ZFMK-DIP-00026902). F. Dorsolateral view. G. Lateral view. Scale bars = 0.5 mm. Material examined Not collected or studied from French Polynesia , but Nishida (2008) reported it from the Society Islands. We believe that Nishida’s records might be a misidentification of I. scutellaris . Geographical distribution Very common Australasian species, found throughout Oceania (from New Caledonia and Fiji to Hawaii), New Zealand and Australia (all states). Simosyrphus grandicornis is absent from the island of New Guinea . Status in French Polynesia Unknown. Flowers visited No records. References Nishida 2008 (list). Remarks Among the material examined there were no individuals of this species from French Polynesia ; thus, we believe that S. grandicornis is not present in the archipelago. Mengual (2015) stated that the dispersal of this species into many of the occupied Oceanic islands in its range was due to human activities, probably introduced by the early Polynesians who might have brought them in as larvae on fruits and plants they were transporting. Because it is plausible that S. grandicornis will reach the islands of French Polynesia in the near future, we have included this species in the identification key (indicated with an asterisk *).