Taxonomic review of the genera Bombylius and Bombylella (Diptera: Bombyliidae) in Korea

Abstract The bee fly genera Bombylius and Bombylella in Korea are taxonomically reviewed. They are among the most commonly encountered flower visiting pollinators that appear mimicking bumblebees. As a result of our investigation of these two closely related genera, we have recognized six Bombylius and one Bombylella species, including two newly recorded (marked by asterisks) and one new species in Korea: Bombylius ambustus *, Bls. callopterus *, Bls. erythropleurus , sp. nov., Bls. lejostomus , Bls. major , Bls. shibakawae , and Bombylella koreanus . Bombylella koreanus has been treated as either Bombylella or Bombylius in the recent literature, but we consider it as belonging to the former genus based on its diagnostic characteristics. Bombylius erythropleurus , sp. nov., is here described new to science based on both sexes collected in South Korea. We also provide a specific key, diagnoses and color photographs of adult external structures including male and female genitalia.