Abstract
Eumerus is an agriculturally important speciose genus of hoverflies (Diptera: Syrphidae) possessing obscure taxonomic status with less information available on its diversity and ecology especially in the Oriental region. We report the first ever distribution record of Eumerus vestitus Bezzi 1912 from the Oriental region. Also this is the first report of E. vestitus Bezzi feeding on fruits of tomato. Association of E. vestitus Bezzi with Atherigona orientalis Schiner, which shared the same larval niche, was discussed. The species was redescribed with illustration of male and female specimens including the male genitalia. The species identity was reconfirmed with DNA barcoding by sequencing the 5/region of mitochondrial cytochrome oxidase subunit I (mtCOI-5P). The evolutionary history inferred by constructing a phylogenetic tree using Maximum Likelihood method based on the Tamura-Nei model showed that E. vestitus Bezzi clustered with E. obliquus (Fab.) thus reconfirming, by molecular means, the evolutionary affinity of the species with the E. obliquus species complex.
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