The Neotropical genus Stenopygium Becker (Diptera: Dolichopodidae: Dolichopodinae) was erected to include S. nubeculum Becker, 1922 (described from Bolivia and Peru) and remained monotypic until Brooks (2005) transferred Pelastoneurus punctipennis (Say, 1829) to the genus. Diagnostic characters of Stenopygium include clypeus bulging and subequal in height to face (Figs 1, 9), vein M1 beyond crossvein dm-m with weak anterior bend before middle (Figs 4, 12), hypopygium subtriangular (Figs 6, 14) and phallus strongly wrinkled (Brooks 2005, figs 28B, 29A–B). Up to now, the genus was recorded from Mexico, Costa Rica, Peru and Bolivia (Yang et al. 2006).