Abstract
In a very important revision of the Streblidae, Speiser (1900) classified them into two subfamilies: (1) the Nycteriboscinae and (2) the Streblinae. To the first subfamily he referred all the genera of the world, with the exception of Strebla and Euctenodes. Upon the presence of the ctenidium and some other characters these two American genera were included in the second subfamily. This classification of the subfamilies was also adopted by Kessel (1924, 1925).