Abstract: The work that is been developed consists in two main purposes: First, to know the fauna of batflies (Diptera: Nycteribiidae and Streblidae) that occurs at the Paraná state. Second, make the pictorial keys to identify the genera and species of Streblidae. This work is been pursing though collections made by the "Centro de Diagnóstico Marcos Enrietti, Secretaria de Estado da Agricultura e do Abastecimento do Estado do Paraná". Beyond of this material collected, also will be used specimens of collections of the main museuns of the Brazil.