A peculiar new Helina Robineau-Desvoidy (Diptera: Muscidae) from Mexico and Panama.

Helina sinaloensis n. sp. (Diptera: Muscidae) is described and illustrated from Mexico and Panama. The new species shows a unique combination of characters and can be distinguished from the other species of the genus by the prosternum with lateral cilia, pre-alar seta absent, anepimeron bare, katepimeron setulose, postalar wall setulose and scutellum with setulae on lateroventral margin.