A Revision of the Genus Nycteribosca Speiser (Diptera Pupipara, Streblidae)

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Abstract
The Genus Nycteribosca was established by Speiser in 1900 for the species which were formerly placed in the genus Raymondia, Strebla or Brachystarsina. This author described one new species and redescribed four others which were already known. Quite recently the number of the species of this genus has been increased to nine by Falcoz. In this paper I have added seven new species, and also give a redescription and figures of all the known species. I have not included N. diversa Frauenfeld in my key, but at the end of this paper there is a description of this fly based on that of Frauenfeld (1856), and a copy of his drawing of the wing. The drawing shows very clearly the branch of the second longitudinal vein. N. diversa appears to be a very doubtful species; it has never been recorded since its original description was written. Moreover, according to Kessel (1925), there is no branching of the second longitudinal vein (R 2+3.) in the family Streblidae.