Genus Hermesomyia Vockeroth, 1969 stat. rev.

Figs 16, 83.

Hermesomyia Vockeroth, 1969: 121, as a genus. Type species: Hermesomyia bacchiformis Vockeroth, 1969 (original designation); jun. syn. of Baccha wulpiana Lynch Arribálzaga, 1891 .

Baccha pirata species group. Hull (1949a).

Ocyptamus (Hermesomyia) . Mengual et al. (2012).

Ocyptamus wulpianus species group. Miranda et al. (2016).

Diagnosis. Straight face with large facial tubercle. Scutum covered by metallic microtrichia. Narrow, linear alula. Parallel-sided elongated abdomen with complete yellow fasciae.

Biology. Larvae of this genus live in the water-filled leaves of bromeliads and have been reported feeding on soft-bodied larvae of craneflies ( Tipulidae), mosquitoes ( Culicidae), aquatic beetles ( Coleoptera, Helodidae), and larvae of other syrphids [ Ornidia obesa (Fabricius, 1775) and Quichuana angustiventris (Macquart, 1855)] under artificial rearing conditions (Rotheray et al. 2000). Rotheray et al. (2000) suggested that H. wulpianus and O. luctuosus (Bigot, 1884a) use venom to subdue their prey.

Comments. When Vockeroth (1969) erected Hermesomyia, he considered it morphologically close to Orphnabaccha due to male genitalic similarities (mainly the O. ampla species group), but it is clearly distinguished by the linear alula and the elongated parallel-sided abdomen with sub-basal pale fascia, and the bare metasternum.

Species list (1): H. wulpiana (Lynch Arribálzaga, 1891) .