A new subgenus and species of Neotropical Trichomyia (Diptera: Psychodidae)

A singular group of 19 species of Neotropical Trichomyia Haliday in Curtis, 1839 presents four segments in the palpus, the first two partially fused; five of these species were included in the subgenus Opisthotrichomyia Bravo, 2001 and seven in the subgenus Brachiotrichomyia Bravo & Araujo, 2013. A new species from Brazil is described and a new subgenus proposed for four Neotropical species of this morphological group: T biloba Quate, 1999 from Panama, and T. onorei Bravo, 2002, T. queirozi Bravo, 2002 and T horrida sp. nov. from Brazil. Syntrichomyia subgen. nov. can be recognized by its fused gonocoxites and gonostyli, and by its bibbed hypoproct. A key to the known species (males) of this new subgenus is presented.