"Bigot, 1857" . "Syrphus quadrifasciatus" . . . "Syrphus quadrifasciatus Bigot, 1857" . . "1534283" . _:b75828442 "GBIF id" . . "Syrphus quadrifasciatus" . . . _:b75828442 . _:b75828442 . . _:b75828442 "1534283" . "919330" . . _:b75828442 .